diff --git a/client/shaders/3d_interlaced_merge/opengl_fragment.glsl b/client/shaders/3d_interlaced_merge/opengl_fragment.glsl
index 7cba61b395..6d3ae5093d 100644
--- a/client/shaders/3d_interlaced_merge/opengl_fragment.glsl
+++ b/client/shaders/3d_interlaced_merge/opengl_fragment.glsl
@@ -6,7 +6,7 @@ uniform sampler2D textureFlags;
 #define rightImage normalTexture
 #define maskImage textureFlags
 
-varying mediump vec2 varTexCoord;
+varying mediump vec4 varTexCoord;
 
 void main(void)
 {
diff --git a/client/shaders/3d_interlaced_merge/opengl_vertex.glsl b/client/shaders/3d_interlaced_merge/opengl_vertex.glsl
index 8600494814..224b7d183f 100644
--- a/client/shaders/3d_interlaced_merge/opengl_vertex.glsl
+++ b/client/shaders/3d_interlaced_merge/opengl_vertex.glsl
@@ -1,4 +1,4 @@
-varying mediump vec2 varTexCoord;
+varying mediump vec4 varTexCoord;
 
 void main(void)
 {