diff --git a/configure.ac b/configure.ac
index 4406edccd..0cd1f8e05 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,8 @@ AS_IF([test "x$enable_threading" = "xyes"], [
   m4_include([m4/autoconf-archive/ax_pthread.m4])
   AX_PTHREAD([
     AC_DEFINE([USE_THREADS], [1], [Define USE_THREADS])
-    LIBS="$LIBS $PTHREAD_LIBS"
+    LIBS="$LIBS $PTHREAD_LIBS $PTHREAD_CFLAGS"
+    echo "LIBS=$LIBS"
   ], [
     AC_MSG_ERROR([pthreads not found])
   ])