diff --git a/cogl/cogl/cogl-trace.h b/cogl/cogl/cogl-trace.h
index 78cdf11e6..10342a064 100644
--- a/cogl/cogl/cogl-trace.h
+++ b/cogl/cogl/cogl-trace.h
@@ -165,7 +165,8 @@ gboolean cogl_is_tracing (void);
 
 COGL_EXPORT
 void cogl_set_tracing_enabled_on_thread (void       *data,
-                                         const char *group)
+                                         const char *group);
+
 COGL_EXPORT
 void cogl_set_tracing_disabled_on_thread (void *data);