diff --git a/configure.ac b/configure.ac
index ea10d35a..c232c0ac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -97,6 +97,7 @@ case $target in
     ;;
   *-*-darwin*)
     OPENCL_LIBS="-framework OpenCL"
+    PTHREAD_FLAGS=""
 	;;
 esac