diff --git a/fomu-flash.c b/fomu-flash.c
index 4567407..f567420 100755
--- a/fomu-flash.c
+++ b/fomu-flash.c
@@ -468,7 +468,7 @@ int main(int argc, char **argv) {
             break;
         }
         close(fd);
-        spiWrite(spi, 0, bfr, stat.st_size);
+        ret += spiWrite(spi, 0, bfr, stat.st_size);
         break;
     }