diff --git a/ext/opcache/config.m4 b/ext/opcache/config.m4
index d5c63d29bba..38f8bd94e7f 100644
--- a/ext/opcache/config.m4
+++ b/ext/opcache/config.m4
@@ -362,7 +362,7 @@ int main() {
   char *shm;
   char tmpname[4096];
 
-  sprintf(tmpname,"/opcache.test.shm.%dXXXXXX", getpid());
+  sprintf(tmpname,"opcache.test.shm.%dXXXXXX", getpid());
   if (mktemp(tmpname) == NULL) {
     return 1;
   }