diff --git a/samples/bin/datas/shader/wave.sfx b/samples/bin/datas/shader/wave.sfx
index 2d04763a..ec5aaf75 100644
--- a/samples/bin/datas/shader/wave.sfx
+++ b/samples/bin/datas/shader/wave.sfx
@@ -4,7 +4,7 @@ uniform vec2 offset;
 
 void main()
 {
-	vec2 texoffset = texture2D(wave, (gl_TexCoord[0].xy * offset).xy);
+	vec2 texoffset = vec2(texture2D(wave, (gl_TexCoord[0].xy * offset).xy));
 	texoffset -= vec2(0.5, 0.5);
 	texoffset *= 0.05;