diff --git a/cogl/cogl-pango/cogl-pango-render.c b/cogl/cogl-pango/cogl-pango-render.c
index d005e9412..8df69637c 100644
--- a/cogl/cogl-pango/cogl-pango-render.c
+++ b/cogl/cogl-pango/cogl-pango-render.c
@@ -39,6 +39,13 @@
 #define PANGO_ENABLE_BACKEND 1
 #endif
 
+#ifndef PANGO_UNKNOWN_GLYPH_WIDTH
+#define PANGO_UNKNOWN_GLYPH_WIDTH 10
+#endif
+#ifndef PANGO_UNKNOWN_GLYPH_HEIGHT
+#define PANGO_UNKNOWN_GLYPH_HEIGHT 14
+#endif
+
 #include <pango/pango-fontmap.h>
 #include <pango/pangocairo.h>
 #include <pango/pango-renderer.h>