diff --git a/common/image-fit.c b/common/image-fit.c
index f3bb00c..4435bc4 100644
--- a/common/image-fit.c
+++ b/common/image-fit.c
@@ -1011,8 +1011,10 @@
 	if (external_data) {
 		debug("External Data\n");
 		ret = fit_image_get_data_size(fit, noffset, &len);
-		*data = fit + offset;
-		*size = len;
+		if (!ret) {
+			*data = fit + offset;
+			*size = len;
+		}
 	} else {
 		ret = fit_image_get_data(fit, noffset, data, size);
 	}