diff --git a/cc3200/application.mk b/cc3200/application.mk
index 78c50b4990..77072e5055 100644
--- a/cc3200/application.mk
+++ b/cc3200/application.mk
@@ -186,6 +186,7 @@ $(BUILD)/hal/%.o: CFLAGS += -Os
 $(BUILD)/misc/%.o: CFLAGS += -Os
 $(BUILD)/py/%.o: CFLAGS += -Os
 $(BUILD)/simplelink/%.o: CFLAGS += -Os
+$(BUILD)/drivers/cc3100/%.o: CFLAGS += -Os
 $(BUILD)/stmhal/%.o: CFLAGS += -Os
 $(BUILD)/telnet/%.o: CFLAGS += -Os
 $(BUILD)/util/%.o: CFLAGS += -Os
diff --git a/cc3200/bootmgr/bootloader.mk b/cc3200/bootmgr/bootloader.mk
index 51eebafad0..b224030039 100644
--- a/cc3200/bootmgr/bootloader.mk
+++ b/cc3200/bootmgr/bootloader.mk
@@ -89,6 +89,7 @@ CFLAGS += -DDEBUG=DEBUG
 # Optimize the stable sources only
 $(BUILD)/hal/%.o: CFLAGS += -Os
 $(BUILD)/simplelink/%.o: CFLAGS += -Os
+$(BUILD)/drivers/cc3100/%.o: CFLAGS += -Os
 $(BUILD)/py/%.o: CFLAGS += -Os
 $(BUILD)/stmhal/%.o: CFLAGS += -Os
 else