diff --git a/cogl/cogl-primitives.h b/cogl/cogl-primitives.h
index d2182b2f5..f638056f3 100644
--- a/cogl/cogl-primitives.h
+++ b/cogl/cogl-primitives.h
@@ -24,6 +24,10 @@
 #ifndef __COGL_PRIMITIVES_H
 #define __COGL_PRIMITIVES_H
 
+#include <glib.h>
+
+G_BEGIN_DECLS
+
 /**
  * SECTION:cogl-primitives
  * @short_description: Functions that draw various primitive 3D shapes
@@ -181,4 +185,6 @@ cogl_polygon (const CoglTextureVertex  *vertices,
               unsigned int              n_vertices,
               gboolean                  use_color);
 
+G_END_DECLS
+
 #endif /* __COGL_PRIMITIVES_H */