diff --git a/Makefile b/Makefile
index 4968eef..e24ee81 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,8 @@ CFLAGS?=-Datmega328p\
 				-MMD\
 				-flto\
 				-fno-fat-lto-objects\
-		  	-fuse-linker-plugin
+		  	-fuse-linker-plugin\
+				-Wall
 
 CXXFLAGS?=-Datmega328p\
 				-Dmega328p\
@@ -40,7 +41,8 @@ CXXFLAGS?=-Datmega328p\
 				-MMD\
 				-flto\
 				-fno-fat-lto-objects\
-		  	-fuse-linker-plugin
+		  	-fuse-linker-plugin\
+				-Wall
 
 INC_DIRS?=-I./$(ARDUINO_DIR)/libraries/SPI/src\
 					-I./$(ARDUINO_DIR)/cores/arduino\