diff --git a/builtin/help.c b/builtin/help.c
index 334a8494ab..991a8bb16c 100644
--- a/builtin/help.c
+++ b/builtin/help.c
@@ -152,6 +152,7 @@ static void exec_man_konqueror(const char *path, const char *page)
 		strbuf_addf(&man_page, "man:%s(1)", page);
 		execlp(path, filename, "newTab", man_page.buf, (char *)NULL);
 		warning_errno(_("failed to exec '%s'"), path);
+		strbuf_release(&man_page);
 	}
 }