1 files changed, 1 insertions, 1 deletions

diff --git a/source/tools/mudraw.c b/source/tools/mudraw.c
index 95b3440b0..720e7ffcd 100644
--- a/source/tools/mudraw.c
+++ b/source/tools/mudraw.c
@@ -578,7 +578,7 @@ static void dodrawpage(fz_context *ctx, fz_page *page, fz_display_list *list, in
                 char buf[512];
                 fz_output *out;
 
-                if (!strcmp(output, "-"))
+                if (!output || !strcmp(output, "-"))
                         out = fz_stdout(ctx);
                 else
                 {