diff --git a/coders/tiff.c b/coders/tiff.c
index aafae4d..0645dfb 100644
--- a/coders/tiff.c
+++ b/coders/tiff.c
@@ -1100,7 +1100,7 @@
     TIFFGetProperties(tiff,image,exception);
     option=GetImageOption(image_info,"tiff:exif-properties");
     if ((option == (const char *) NULL) ||
-        (IsMagickTrue(option) == MagickFalse))
+        (IsMagickTrue(option) != MagickFalse))
       TIFFGetEXIFProperties(tiff,image,exception);
     /*
       Allocate memory for the image and pixel buffer.