1 files changed, 5 insertions, 2 deletions

diff --git a/sway/commands.c b/sway/commands.c
index fdae1961..81e9ea42 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -511,11 +511,14 @@ struct cmd_results *cmd_results_new(enum cmd_status status,
                 results->input = NULL;
         }
         if (format) {
-                char *error = malloc(256);
                 va_list args;
                 va_start(args, format);
+                size_t length = vsnprintf(NULL, 0, format, args) + 1;
+                char *error = malloc(length);
+                va_end(args);
+                va_start(args, format);
                 if (error) {
-                        vsnprintf(error, 256, format, args);
+                        vsnprintf(error, length, format, args);
                 }
                 va_end(args);
                 results->error = error;