diff --git a/ctest/constant.c b/ctest/constant.c
index 861d70bcc..474c6c92f 100644
--- a/ctest/constant.c
+++ b/ctest/constant.c
@@ -1,3 +1,4 @@
+#include <cblas_test.h>
 int CBLAS_CallFromC;
 int RowMajorStrg;