diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index 1976a20601..c7f527e9b2 100644
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -844,6 +844,8 @@ long wxExecute(wxChar **argv,
         return exitcode;
 #endif // wxUSE_GUI
     }
+
+    return ERROR_RETURN_CODE;
 }
 
 #undef ERROR_RETURN_CODE