diff --git a/lib/tests/t_api.c b/lib/tests/t_api.c
index 5d988a2a7f..8a6f51be61 100644
--- a/lib/tests/t_api.c
+++ b/lib/tests/t_api.c
@@ -15,6 +15,8 @@
  * SOFTWARE.
  */
 
+#include	<config.h>
+
 #include	<ctype.h>
 #include	<errno.h>
 #include	<limits.h>