diff --git a/Makefile b/Makefile
index 7f7ca8e..faa6554 100644
--- a/Makefile
+++ b/Makefile
@@ -337,6 +337,7 @@
     $(eval CRT_ARGS += $(if ${TRUSTED_WORLD_KEY}, --trusted-world-key ${TRUSTED_WORLD_KEY}))
     $(eval CRT_ARGS += $(if ${NON_TRUSTED_WORLD_KEY}, --non-trusted-world-key ${NON_TRUSTED_WORLD_KEY}))
     $(eval CRT_ARGS += --trusted-key-cert ${TRUSTED_KEY_CERT})
+    $(eval CRT_ARGS += $(if ${KEY_ALG}, --key-alg ${KEY_ALG}))
 endif
 
 # Check Trusted Board Boot options