diff --git a/openbsc/src/debug.c b/openbsc/src/debug.c
index 15271fe..8b0f25e 100644
--- a/openbsc/src/debug.c
+++ b/openbsc/src/debug.c
@@ -231,6 +231,7 @@
 			va_list bp;
 			va_copy(bp, ap);
 			_output(tar, subsys, file, line, cont, format, bp);
+			va_end(bp);
 		}
 	}
 }