diff --git a/services/spd/trusty/trusty.c b/services/spd/trusty/trusty.c
index e62f739..e27df15 100644
--- a/services/spd/trusty/trusty.c
+++ b/services/spd/trusty/trusty.c
@@ -409,7 +409,7 @@
 
 	instr = *(uint32_t *)ep_info->pc;
 
-	if (instr >> 24 == 0xea) {
+	if (instr >> 24 == 0xeaU) {
 		INFO("trusty: Found 32 bit image\n");
 		aarch32 = true;
 	} else if (instr >> 8 == 0xd53810 || instr >> 16 == 0x9400) {