diff --git a/src/visual/glez.h b/include/visual/glez.h
similarity index 100%
rename from src/visual/glez.h
rename to include/visual/glez.h
diff --git a/src/visual/xoverlay.h b/include/visual/xoverlay.h
similarity index 100%
rename from src/visual/xoverlay.h
rename to include/visual/xoverlay.h
diff --git a/makefile b/makefile
index ef701428..a0b90a7c 100644
--- a/makefile
+++ b/makefile
@@ -43,7 +43,7 @@ ENABLE_NULL_GRAPHICS:=1
 endif
 
 OUT_NAME = libcathook.so
-SSDK_DIR=$(realpath source-sdk-2013/mp/src)
+SSDK_DIR=$(realpath source-sdk-2013-headers/mp/src)
 SIPC_DIR=$(realpath simple-ipc/src/include)
 LIB_DIR=lib
 SRC_DIR=src
@@ -51,7 +51,7 @@ RES_DIR=res
 OUT_DIR=bin
 TARGET = $(OUT_DIR)/$(OUT_NAME)
 
-INCLUDES=-I. -Iinclude -Iucccccp -isystem/usr/include/c++/6.3.1 -isystem$(SSDK_DIR)/public -isystem$(SSDK_DIR)/mathlib -isystem$(SSDK_DIR)/common -isystem$(SSDK_DIR)/public/tier1 -isystem$(SSDK_DIR)/public/tier0 -isystem$(SSDK_DIR)
+INCLUDES=-Iinclude -I. -Iucccccp -isystem$(SSDK_DIR)/public -isystem$(SSDK_DIR)/mathlib -isystem$(SSDK_DIR)/common -isystem$(SSDK_DIR)/public/tier1 -isystem$(SSDK_DIR)/public/tier0 -isystem$(SSDK_DIR)
 LDLIBS=-static -l:libc.so.6 -l:libstdc++.so.6 -l:libtier0.so -l:libvstdlib.so
 LDFLAGS=-shared -L$(realpath $(LIB_DIR))
 #LDFLAGS+=-Wl,--no-undefined
diff --git a/src/visual/drawex.cpp b/src/visual/drawex.cpp
index ef5d1349..0f788d93 100644
--- a/src/visual/drawex.cpp
+++ b/src/visual/drawex.cpp
@@ -14,7 +14,7 @@
 #include <GL/gl.h>
 
 extern "C" {
-#include "xoverlay.h"
+#include "visual/xoverlay.h"
 }
 
 #define DRAW_XOVERLAY 0