diff --git a/ta/mk/ta_dev_kit.mk b/ta/mk/ta_dev_kit.mk
index da788d592ed..699470fb5f7 100644
--- a/ta/mk/ta_dev_kit.mk
+++ b/ta/mk/ta_dev_kit.mk
@@ -128,7 +128,7 @@ ifneq ($(user-ta-uuid),)
 # Build target is TA
 spec-out-dir := $(link-out-dir$(sm))
 spec-srcs += $(ta-dev-kit-dir$(sm))/src/user_ta_header.c
-ifeq ($(ta-target),ta_arm32)
+ifeq ($(sm),ta_arm32)
 spec-srcs += $(ta-dev-kit-dir$(sm))/src/ta_entry_a32.S
 endif
 endif