diff --git a/src/main/target/PORT103R/target.mk b/src/main/target/PORT103R/target.mk
index 411a04e02..2246dc605 100644
--- a/src/main/target/PORT103R/target.mk
+++ b/src/main/target/PORT103R/target.mk
@@ -1,4 +1,7 @@
 F1_TARGETS  += $(TARGET)
+256K_TARGETS += $(TARGET)
+FLASH_SIZE = 256
+
 FEATURES     = ONBOARDFLASH HIGHEND 
 
 DEVICE_FLAGS    = -DSTM32F10X_HD