diff --git a/ext/mime_magic/config.m4 b/ext/mime_magic/config.m4
index 21e1c88a1ea..9342ed23064 100644
--- a/ext/mime_magic/config.m4
+++ b/ext/mime_magic/config.m4
@@ -4,7 +4,7 @@ dnl config.m4 for extension mime_magic
 PHP_ARG_ENABLE(mime_magic, whether to enable mime_magic support,
 [  --enable-mime_magic           Enable mime_magic support])
 
-if test "$PHP_MIME_MAGIC" != "no"; then
+if test "$PHP_MIME_MAGIC" = "yes"; then
   dnl PHP_SUBST(MIME_MAGIC_SHARED_LIBADD)
 
   PHP_NEW_EXTENSION(mime_magic, mime_magic.c, $ext_shared)