diff --git a/mkopcode.awk b/mkopcode.awk
index 400c118..d5e024b 100755
--- a/mkopcode.awk
+++ b/mkopcode.awk
@@ -1,4 +1,4 @@
-#!/usr/bin/gawk -f
+#!/usr/bin/awk -f
 # vim:ts=4:sw=4
 # process zend_vm_def.h or zend_compile.h
 BEGIN {
diff --git a/mkopcode_spec.awk b/mkopcode_spec.awk
index c23067a..765e0f6 100755
--- a/mkopcode_spec.awk
+++ b/mkopcode_spec.awk
@@ -1,4 +1,4 @@
-#!/usr/bin/gawk -f
+#!/usr/bin/awk -f
 # vim:ts=4:sw=4
 # process eaccelerator/opcodes.c
 BEGIN {
diff --git a/mkstructinfo.awk b/mkstructinfo.awk
index b14bbc6..1fa3dcf 100755
--- a/mkstructinfo.awk
+++ b/mkstructinfo.awk
@@ -1,4 +1,4 @@
-#!/usr/bin/gawk -f
+#!/usr/bin/awk -f
 # vim:ts=4:sw=4
 BEGIN {
 	brace = 0;