diff --git a/CMakeLists.txt b/CMakeLists.txt
index 764a41f2b..11118595f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -302,6 +302,7 @@ if (WIN32 AND HB_HAVE_DIRECTWRITE)
 endif ()
 
 if (HB_HAVE_GOBJECT)
+  add_definitions(-DHAVE_GOBJECT)
   include (FindPerl)
 
   # Use the hints from glib-2.0.pc to find glib-mkenums