diff --git a/include/openbsc/debug.h b/include/openbsc/debug.h
index b95b1a7..b3b1702 100644
--- a/include/openbsc/debug.h
+++ b/include/openbsc/debug.h
@@ -18,5 +18,6 @@
 #endif
 
 void debugp(unsigned int subsys, char *file, int line, const char *format, ...);
+void parse_category_mask(const char* mask);
 
 #endif /* _DEBUG_H */