diff --git a/Makefile b/Makefile
index 7132a4b..3c9ae0e 100644
--- a/Makefile
+++ b/Makefile
@@ -14,12 +14,12 @@ ALLTEST     = $(shell find test/ -name '*.cpp') $(shell find test/ -name '*.h')
 EXAMPLESRC  = $(shell find example/ -name '*.cpp') $(shell find example/ -name '*.h')
 
 # Compiler & linker flags.
-CFLAGS     = -std=c++11 -Wall -fPIC
+CFLAGS     = -std=c++11 -Wall -Werror -fPIC
 LIBFLAGS   = -shared
 TARGET     = libsqlparser.so
 INSTALL    = /usr/local
 
-CTESTFLAGS = -Wall -Isrc/ -Itest/ -L./ -std=c++11 -lstdc++
+CTESTFLAGS = -Wall -Werror -Isrc/ -Itest/ -L./ -std=c++11 -lstdc++
 
 # Set compile mode to -g or -O3.
 MODE_LOG = ""
diff --git a/benchmark/Makefile b/benchmark/Makefile
index c5564a3..1b6caae 100644
--- a/benchmark/Makefile
+++ b/benchmark/Makefile
@@ -2,7 +2,7 @@
 SRC = ./
 CPP  = $(shell find $(SRC) -name '*.cpp')
 
-CFLAGS = -std=c++11 -lstdc++ -Wall -I../src/ -L../ -O3
+CFLAGS = -std=c++11 -lstdc++ -Wall -Werror -I../src/ -L../ -O3
 
 all: parser_benchmark
 
diff --git a/example/Makefile b/example/Makefile
index 18a3f54..8e241c1 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -1,5 +1,5 @@
 
-CFLAGS = -std=c++11 -lstdc++ -Wall -I../src/ -L../
+CFLAGS = -std=c++11 -lstdc++ -Wall -Werror -I../src/ -L../
 
 all:
 	$(CXX) $(CFLAGS) example.cpp -o example -lsqlparser