diff --git a/qemu-img.c b/qemu-img.c
index 9a5e7e1..603bdb3 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -331,7 +331,7 @@ static int img_create(int argc, char **argv)
     /* Get image size, if specified */
     if (optind < argc) {
         ssize_t sval;
-        sval = strtosz(argv[optind++], NULL);
+        sval = strtosz_suffix(argv[optind++], NULL, STRTOSZ_DEFSUFFIX_B);
         if (sval < 0) {
             error("Invalid image size specified! You may use k, M, G or "
                   "T suffixes for ");