diff --git a/Makefile b/Makefile
index 95775e8..4a52e85 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # Compiler and flags
 CXX = g++
-CXXFLAGS = -Wall -Wextra -std=c++11 -I./src -I./ext/raylib/src
+CXXFLAGS = -Wall -Wextra -std=c++11 -I./src -isystem./ext/raylib/src
 LDFLAGS = -L./ext/raylib/src -lraylib -lm -lpthread -ldl -lrt -lX11
 
 # Directories