diff --git a/components/esp32/component.mk b/components/esp32/component.mk
index aef14ab3c..3223ec7ba 100644
--- a/components/esp32/component.mk
+++ b/components/esp32/component.mk
@@ -2,9 +2,9 @@
 # Component Makefile
 #
 
-#ifdef IS_BOOTLOADER_BUILD
+ifdef IS_BOOTLOADER_BUILD
 CFLAGS += -DBOOTLOADER_BUILD
-#endif
+endif
 
 COMPONENT_SRCDIRS := . hwcrypto
 LIBS := core rtc