diff --git a/WINGs/string.c b/WINGs/string.c
index 8cb0b031..d4c426d4 100644
--- a/WINGs/string.c
+++ b/WINGs/string.c
@@ -210,14 +210,3 @@ char *wstrappend(char *dst, char *src)
 	return dst;
 }
 
-#ifndef HAVE_STRCASECMP
-int strcasecmp(const char *s1, const char *s2)
-{
-	while (*s1 && *s2 && (tolower(*s1) == tolower(*s2))) {
-		s1++;
-		s2++;
-	}
-
-	return (tolower(*s1) - tolower(*s2));
-}
-#endif
diff --git a/configure.ac b/configure.ac
index 4606bc70..deaac5c8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -145,7 +145,7 @@ dnl ============================
 dnl Checks for library functions
 dnl ============================
 dnl not used anywhere
-dnl AC_FUNC_MEMCMP  
+AC_FUNC_MEMCMP
 AC_FUNC_VPRINTF
 AC_CHECK_FUNCS(gethostname select poll strerror strcasecmp strncasecmp \
 	       setsid atexit mallinfo mkstemp)