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-rw-r--r--editor/pamditherbw.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/editor/pamditherbw.c b/editor/pamditherbw.c
index e3a121d4..6ec2511a 100644
--- a/editor/pamditherbw.c
+++ b/editor/pamditherbw.c
@@ -104,7 +104,7 @@ parseCommandLine(int argc, char ** argv,
     if (floydOpt + atkinsonOpt + thresholdOpt + hilbertOpt + dither8Opt +
         cluster3Opt + cluster4Opt + cluster8Opt == 0)
         cmdlineP->halftone = QT_FS;
-    else if (floydOpt + atkinsonOpt + thresholdOpt + dither8Opt +
+    else if (floydOpt + atkinsonOpt + thresholdOpt + hilbertOpt + dither8Opt +
         cluster3Opt + cluster4Opt + cluster8Opt > 1)
         pm_error("Cannot specify more than one halftoning type");
     else {