diff --git a/boot/image-fit-sig.c b/boot/image-fit-sig.c
index a461d59..1236989 100644
--- a/boot/image-fit-sig.c
+++ b/boot/image-fit-sig.c
@@ -260,10 +260,10 @@
 				char **err_msgp)
 {
 	static char * const exc_prop[] = {
-		"data",
-		"data-size",
-		"data-position",
-		"data-offset"
+		FIT_DATA_PROP,
+		FIT_DATA_SIZE_PROP,
+		FIT_DATA_POSITION_PROP,
+		FIT_DATA_OFFSET_PROP,
 	};
 
 	const char *prop, *end, *name;