diff --git a/acinclude.m4 b/acinclude.m4
index 3284978804f..d348f574b80 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1711,7 +1711,7 @@ int main(int argc, char *argv[])
 {
   FILE *fp;
   long position;
-  char *filename = "/tmp/phpglibccheck";
+  char *filename = tmpnam(NULL);
   
   fp = fopen(filename, "w");
   if (fp == NULL) {