...

diff --git a/coders/pnm.c b/coders/pnm.c
index 3ee13e8c456b9681b4c64ea127a614b839352ec6..7e2e45c74a085dac8c8501c320e8751944c440b8 100644 (file)
--- a/coders/pnm.c
+++ b/coders/pnm.c
@@ -1661,7 +1661,7 @@ static MagickBooleanType WritePNMImage(const ImageInfo *image_info,Image *image,
           {
             packet_size=1;
             (void) CopyMagickString(type,"GRAYSCALE",MagickPathExtent);
-            if (IsImageMonochrome(image) != MagickFalse)
+            if (IdentifyImageMonochrome(image,exception) != MagickFalse)
               (void) CopyMagickString(type,"BLACKANDWHITE",MagickPathExtent);
             break;
           }