1 files changed, 3 insertions, 0 deletions
diff --git a/src/expr.c b/src/expr.c
index a077cce..c5fcf06 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -281,6 +281,9 @@ int nftnl_expr_snprintf(char *buf, size_t size, const struct nftnl_expr *expr,
 	int ret;
 	unsigned int offset = 0, remain = size;
 
+	if (size)
+		buf[0] = '\0';
+
 	if (!expr->ops->snprintf)
 		return 0;