diff --git a/src/build/libgnuregex/regex.c b/src/build/libgnuregex/regex.c
index 8169880d7e..d78dc7e0fe 100644
--- a/src/build/libgnuregex/regex.c
+++ b/src/build/libgnuregex/regex.c
@@ -63,13 +63,7 @@
 #include <strings.h>
 #endif
 
-#ifdef STDC_HEADERS
 #include <stdlib.h>
-#else
-char *malloc ();
-char *realloc ();
-#endif
-
 
 /* Define the syntax stuff for \<, \>, etc.  */