diff --git a/libs/gamecode/builtins/pr_cmds.c b/libs/gamecode/builtins/pr_cmds.c
index a01eab642..041ff1ea0 100644
--- a/libs/gamecode/builtins/pr_cmds.c
+++ b/libs/gamecode/builtins/pr_cmds.c
@@ -580,7 +580,7 @@ PF_sprintf (progs_t *pr)
 	format = G_STRING (pr, OFS_PARM0);
 	c = format;
 
-	out = malloc (out_size);
+	out = malloc (out_max);
 	if (!out)
 		goto mallocerror;