diff --git a/src/lib/unit.c b/src/lib/unit.c
index f1142e3..a215222 100644
--- a/src/lib/unit.c
+++ b/src/lib/unit.c
@@ -339,8 +339,8 @@ exactness_image_compare(Exactness_Image *img1, Exactness_Image *img2, Exactness_
      {
         for (h = 0; h < hO; h++)
           {
-             Eina_Bool valid1 = img1 ? w <= w1 && h <= h1 : EINA_FALSE;
-             Eina_Bool valid2 = img2 ? w <= w2 && h <= h2 : EINA_FALSE;
+             Eina_Bool valid1 = img1 ? w < w1 && h < h1 : EINA_FALSE;
+             Eina_Bool valid2 = img2 ? w < w2 && h < h2 : EINA_FALSE;
              int px1 = valid1 ? pxs1[h * w1 + w] : 0;
              int px2 = valid2 ? pxs2[h * w2 + w] : 0;
              int r1 = (px1 & 0x00FF0000) >> 16;