diff --git a/cv_bridge/src/module.hpp b/cv_bridge/src/module.hpp
index 92153ac80..c5ce3442f 100644
--- a/cv_bridge/src/module.hpp
+++ b/cv_bridge/src/module.hpp
@@ -37,6 +37,7 @@ PyObject* pyopencv_from(const cv::Mat& m);
 static int do_numpy_import( )
 {
     import_array( );
+    return NULL;
 }
 #else
 static void do_numpy_import( )