diff --git a/src/mod_dirlisting.c b/src/mod_dirlisting.c
index f3d08089..9774c549 100644
--- a/src/mod_dirlisting.c
+++ b/src/mod_dirlisting.c
@@ -338,15 +338,15 @@ SETDEFAULTS_FUNC(mod_dirlisting_set_defaults) {
 }
 
 typedef struct {
-	size_t  namelen;
+	uint32_t namelen;
 	time_t  mtime;
 	off_t   size;
 } dirls_entry_t;
 
 typedef struct {
 	dirls_entry_t **ent;
-	size_t used;
-	size_t size;
+	uint32_t used;
+	uint32_t size;
 } dirls_list_t;
 
 #define DIRLIST_ENT_NAME(ent)	((char*)(ent) + sizeof(dirls_entry_t))
@@ -919,7 +919,7 @@ static int http_list_directory(request_st * const r, plugin_data * const p, buff
 		tmp = (dirls_entry_t*) malloc(sizeof(dirls_entry_t) + 1 + i);
 		tmp->mtime = st.st_mtime;
 		tmp->size  = st.st_size;
-		tmp->namelen = i;
+		tmp->namelen = (uint32_t)i;
 		memcpy(DIRLIST_ENT_NAME(tmp), dent->d_name, i + 1);
 
 		list->ent[list->used++] = tmp;
diff --git a/src/mod_webdav.c b/src/mod_webdav.c
index 0f9c6a4c..713c678d 100644
--- a/src/mod_webdav.c
+++ b/src/mod_webdav.c
@@ -2225,7 +2225,7 @@ webdav_response_etag (request_st * const r, struct stat *st)
 static void
 webdav_parent_modified (const buffer *path)
 {
-    size_t dirlen = buffer_string_length(path);
+    uint32_t dirlen = buffer_string_length(path);
     const char *fn = path->ptr;
     /*force_assert(0 != dirlen);*/
     /*force_assert(fn[0] == '/');*/
@@ -2260,7 +2260,7 @@ webdav_parse_Depth (const request_st * const r)
 
 static int
 webdav_unlinkat (const plugin_config * const pconf, const buffer * const uri,
-                 const int dfd, const char * const d_name, size_t len)
+                 const int dfd, const char * const d_name, uint32_t len)
 {
     if (0 == unlinkat(dfd, d_name, 0)) {
         stat_cache_delete_entry(d_name, len);
diff --git a/src/stat_cache.c b/src/stat_cache.c
index 9a38408a..f8fe0429 100644
--- a/src/stat_cache.c
+++ b/src/stat_cache.c
@@ -57,26 +57,26 @@ static stat_cache sc;
 
 /* the famous DJB hash function for strings */
 __attribute_pure__
-static uint32_t djbhash(const char *str, const size_t len)
+static uint32_t djbhash(const char *str, const uint32_t len)
 {
     const unsigned char * const s = (const unsigned char *)str;
     uint32_t hash = 5381;
-    for (size_t i = 0; i < len; ++i) hash = ((hash << 5) + hash) ^ s[i];
+    for (uint32_t i = 0; i < len; ++i) hash = ((hash << 5) + hash) ^ s[i];
     return hash;
 }
 
 
 __attribute_pure__
-static uint32_t hashme(const char *str, const size_t len)
+static int32_t hashme(const char *str, const uint32_t len)
 {
     /* strip highest bit of hash value for splaytree */
-    return djbhash(str,len) & ~(((uint32_t)1) << 31);
+    return (int32_t)(djbhash(str,len) & ~(((uint32_t)1) << 31));
 }
 
 
 static void * stat_cache_sptree_find(splay_tree ** const sptree,
                                      const char * const name,
-                                     size_t len)
+                                     uint32_t len)
 {
     const int ndx = hashme(name, len);
     *sptree = splaytree_splay(*sptree, ndx);
@@ -252,7 +252,7 @@ static void fam_dir_invalidate_tree(splay_tree *t, const char *name, size_t len)
 }
 
 /* declarations */
-static void stat_cache_delete_tree(const char *name, size_t len);
+static void stat_cache_delete_tree(const char *name, uint32_t len);
 static void stat_cache_invalidate_dir_tree(const char *name, size_t len);
 
 static void stat_cache_handle_fdevent_in(stat_cache_fam *scf)
@@ -412,7 +412,7 @@ static void stat_cache_free_fam(stat_cache_fam *scf) {
 	free(scf);
 }
 
-static fam_dir_entry * fam_dir_monitor(stat_cache_fam *scf, char *fn, size_t dirlen, struct stat *st)
+static fam_dir_entry * fam_dir_monitor(stat_cache_fam *scf, char *fn, uint32_t dirlen, struct stat *st)
 {
     if (NULL == scf->fdn) return NULL; /* FAM connection closed; do nothing */
     const int fn_is_dir = S_ISDIR(st->st_mode);
@@ -653,7 +653,7 @@ int stat_cache_choose_engine (const buffer *stat_cache_string, log_error_st *err
     return 0;
 }
 
-const buffer * stat_cache_mimetype_by_ext(const array * const mimetypes, const char * const name, const size_t nlen)
+const buffer * stat_cache_mimetype_by_ext(const array * const mimetypes, const char * const name, const uint32_t nlen)
 {
     const char * const end = name + nlen; /*(end of string)*/
     const uint32_t used = mimetypes->used;
@@ -783,7 +783,7 @@ const buffer * stat_cache_etag_get(stat_cache_entry *sce, int flags) {
     return NULL;
 }
 
-void stat_cache_update_entry(const char *name, size_t len,
+void stat_cache_update_entry(const char *name, uint32_t len,
                              struct stat *st, buffer *etagb)
 {
     if (sc.stat_cache_engine == STAT_CACHE_ENGINE_NONE) return;
@@ -802,7 +802,7 @@ void stat_cache_update_entry(const char *name, size_t len,
     }
 }
 
-void stat_cache_delete_entry(const char *name, size_t len)
+void stat_cache_delete_entry(const char *name, uint32_t len)
 {
     if (sc.stat_cache_engine == STAT_CACHE_ENGINE_NONE) return;
     force_assert(0 != len);
@@ -815,7 +815,7 @@ void stat_cache_delete_entry(const char *name, size_t len)
     }
 }
 
-void stat_cache_invalidate_entry(const char *name, size_t len)
+void stat_cache_invalidate_entry(const char *name, uint32_t len)
 {
     splay_tree **sptree = &sc.files;
     stat_cache_entry *sce = stat_cache_sptree_find(sptree, name, len);
@@ -898,13 +898,13 @@ static void stat_cache_prune_dir_tree(const char *name, size_t len)
     sc.files = sptree;
 }
 
-static void stat_cache_delete_tree(const char *name, size_t len)
+static void stat_cache_delete_tree(const char *name, uint32_t len)
 {
     stat_cache_delete_entry(name, len);
     stat_cache_prune_dir_tree(name, len);
 }
 
-void stat_cache_delete_dir(const char *name, size_t len)
+void stat_cache_delete_dir(const char *name, uint32_t len)
 {
     force_assert(0 != len);
     if (name[len-1] == '/') { if (0 == --len) len = 1; }
diff --git a/src/stat_cache.h b/src/stat_cache.h
index dd7435b6..41e00833 100644
--- a/src/stat_cache.h
+++ b/src/stat_cache.h
@@ -35,7 +35,7 @@ void stat_cache_free(void);
 __attribute_cold__
 void stat_cache_xattrname (const char *name);
 
-const buffer * stat_cache_mimetype_by_ext(const array *mimetypes, const char *name, size_t nlen);
+const buffer * stat_cache_mimetype_by_ext(const array *mimetypes, const char *name, uint32_t nlen);
 #if defined(HAVE_XATTR) || defined(HAVE_EXTATTR)
 const buffer * stat_cache_mimetype_by_xattr(const char *name);
 const buffer * stat_cache_content_type_get_by_xattr(stat_cache_entry *sce, const array *mimetypes, int use_xattr);
@@ -45,10 +45,10 @@ const buffer * stat_cache_content_type_get_by_ext(stat_cache_entry *sce, const a
 #define stat_cache_content_type_get(con, r) stat_cache_content_type_get_by_ext((sce), (r)->conf.mimetypes)
 #endif
 const buffer * stat_cache_etag_get(stat_cache_entry *sce, int flags);
-void stat_cache_update_entry(const char *name, size_t len, struct stat *st, buffer *etagb);
-void stat_cache_delete_entry(const char *name, size_t len);
-void stat_cache_delete_dir(const char *name, size_t len);
-void stat_cache_invalidate_entry(const char *name, size_t len);
+void stat_cache_update_entry(const char *name, uint32_t len, struct stat *st, buffer *etagb);
+void stat_cache_delete_entry(const char *name, uint32_t len);
+void stat_cache_delete_dir(const char *name, uint32_t len);
+void stat_cache_invalidate_entry(const char *name, uint32_t len);
 stat_cache_entry * stat_cache_get_entry(const buffer *name);
 int stat_cache_path_contains_symlink(const buffer *name, log_error_st *errh);
 int stat_cache_open_rdonly_fstat (const buffer *name, struct stat *st, int symlinks);