diff --git a/BaseLib/BuildInfo.h.in b/BaseLib/BuildInfo.h.in
index e0ed78cdf4b3850a3de62a0c7a801d9019941c2b..52f8f03753817674544a8ca221fb4dc2f7fe0f6b 100644
--- a/BaseLib/BuildInfo.h.in
+++ b/BaseLib/BuildInfo.h.in
@@ -32,4 +32,8 @@
 #cmakedefine CMAKE_GENERATOR "${CMAKE_GENERATOR}"
 #cmakedefine HOSTNAME "${HOSTNAME}"
 
+#ifndef CMAKE_CXX_FLAGS
+#define CMAKE_CXX_FLAGS ""
+#endif // CMAKE_CXX_FLAGS
+
 #endif // BUILDINFO_H