diff --git a/src/include/fann_cpp.h b/src/include/fann_cpp.h
index 131b16c6..73e24cb1 100644
--- a/src/include/fann_cpp.h
+++ b/src/include/fann_cpp.h
@@ -63,6 +63,7 @@
  *
  */
 
+#include <assert.h>
 #include <stdarg.h>
 #include <string>
 #include "fann_data_cpp.h"