diff --git a/library/entropy.c b/library/entropy.c
index 282640f..45c894b 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -28,9 +28,9 @@
 #if defined(MBEDTLS_ENTROPY_C)
 
 #if defined(MBEDTLS_TEST_NULL_ENTROPY)
-#warning "**** WARNING!  MBEDTLS_TEST_NULL_ENTROPY defined! ****"
-#warning "**** THIS BUILD HAS NO DEFINED ENTROPY SOURCES    ****"
-#warning "**** NOT SUITABLE FOR PRODUCTION                  ****"
+#warning "**** WARNING!  MBEDTLS_TEST_NULL_ENTROPY defined! "
+#warning "**** THIS BUILD HAS NO DEFINED ENTROPY SOURCES "
+#warning "**** THIS BUILD IS *NOT* SUITABLE FOR PRODUCTION USE "
 #endif
 
 #include "mbedtls/entropy.h"