diff --git a/libraries/liblber/debug.c b/libraries/liblber/debug.c
index ae8600c3d6..02f439d87d 100644
--- a/libraries/liblber/debug.c
+++ b/libraries/liblber/debug.c
@@ -77,7 +77,7 @@ int lutil_mnem2subsys( const char *subsys )
     return -1;
 }
 
-void lutil_set_all_backends( level )
+void lutil_set_all_backends( int level )
 {
     int i;