diff --git a/src/cairo-truetype-subset.c b/src/cairo-truetype-subset.c
index 86509dfb1..8e38f2f52 100644
--- a/src/cairo-truetype-subset.c
+++ b/src/cairo-truetype-subset.c
@@ -716,7 +716,7 @@ cairo_truetype_font_calculate_checksum (cairo_truetype_font_t *font,
     p = (uint32_t *) (data + start);
     padded_end = (uint32_t *) (data + ((end + 3) & ~3));
     while (p < padded_end)
-	checksum += *p++;
+	checksum += be32_to_cpu(*p++);
 
     return checksum;
 }