diff --git a/common/flatpak-utils.c b/common/flatpak-utils.c
index d3447cdb5..33ee5e024 100644
--- a/common/flatpak-utils.c
+++ b/common/flatpak-utils.c
@@ -4067,6 +4067,7 @@ flatpak_number_prompt (int min, int max, const char *prompt, ...)
 
   va_start (var_args, prompt);
   s = g_strdup_vprintf (prompt, var_args);
+  va_end (var_args);
 
   while (TRUE)
     {