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-rw-r--r--extra/usb_updater/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/extra/usb_updater/Makefile b/extra/usb_updater/Makefile
index f1ec4f8b0e..ac21ba8e93 100644
--- a/extra/usb_updater/Makefile
+++ b/extra/usb_updater/Makefile
@@ -19,7 +19,7 @@ CFLAGS := -std=gnu99 \
-Wredundant-decls \
-Wmissing-declarations
-ifeq ($(DEBUG),1)
+ifneq ($(DEBUG),)
CFLAGS += -O0
else
CFLAGS += -O3