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-rw-r--r--demos/KINETIS/RT-FREEDOM-K20D50M/Makefile4
1 files changed, 2 insertions, 2 deletions
diff --git a/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile b/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile
index 022e4bc5c..2e2fad272 100644
--- a/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile
+++ b/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile
@@ -181,10 +181,10 @@ AOPT =
TOPT = -mthumb -DTHUMB
# Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
# Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
#
# Compiler settings