diff --git a/project/msm8909.mk b/project/msm8909.mk
index 87e6e6d..cbf4b47 100644
--- a/project/msm8909.mk
+++ b/project/msm8909.mk
@@ -108,7 +108,11 @@
 DEFINES += FBCON_DISPLAY_MSG=1
 endif
 
-#Increase TZ apps region to 2 MB due to KM 3.0 support
+#TZ apps region address based on version
+ifeq ($(TARGET_USE_QSEECOM_V4),1)
+ DEFINES += QSEECOM_SECAPP_REGION_3MB=1
+endif
+
 ifeq ($(QSEECOM_SECAPP_REGION_2MB),1)
  DEFINES += QSEECOM_SECAPP_REGION_2MB=1
 endif