diff --git a/Makefile b/Makefile
index faea678..a7b23a8 100644
--- a/Makefile
+++ b/Makefile
@@ -110,13 +110,15 @@ MACOSX_LIBS= \
 	-L$(PRE_BUILT)/macos \
 	-L/usr/local/lib \
 	-lSDL2 -lm -liconv -lobjc -llua -lwren -lz -lgif \
+	-lsdlgpu \
 	-Wl,-framework,CoreAudio \
 	-Wl,-framework,AudioToolbox \
 	-Wl,-framework,ForceFeedback \
 	-Wl,-framework,CoreVideo \
 	-Wl,-framework,Cocoa \
 	-Wl,-framework,Carbon \
-	-Wl,-framework,IOKit
+	-Wl,-framework,IOKit \
+	-Wl,-framework,OpenGL
 
 SOURCES=\
 	src/studio.c \
diff --git a/src/ext/shader/common.vert b/src/ext/shader/common.vert
index c222b3a..ff038ec 100644
--- a/src/ext/shader/common.vert
+++ b/src/ext/shader/common.vert
@@ -1,4 +1,4 @@
-SHADER(
+SHADER(#version 100\n
 
 precision highp float;
 precision mediump int;
diff --git a/src/ext/shader/crt-lottes.frag b/src/ext/shader/crt-lottes.frag
index 633ca54..aa7fe10 100644
--- a/src/ext/shader/crt-lottes.frag
+++ b/src/ext/shader/crt-lottes.frag
@@ -1,4 +1,4 @@
-SHADER(
+SHADER(#version 100\n
 
 precision highp float;