diff --git a/unit_tests/Makefile b/unit_tests/Makefile
index 71ed7d2112..d9129df54c 100644
--- a/unit_tests/Makefile
+++ b/unit_tests/Makefile
@@ -199,7 +199,7 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wstrict-prototypes -pedantic -Wmissing-prototypes -Wold-style-definition -Wextra
 
 # Define C++ warning options here
 CPPWARN = -Wall -Wextra