diff --git a/src/renderers/webgl/WebGLUniforms.js b/src/renderers/webgl/WebGLUniforms.js
index b36ff42bb05faa636ecdcf301f46d136d299c26b..a2b82f5f8857e228373527f2455fd1572066cc31 100644
--- a/src/renderers/webgl/WebGLUniforms.js
+++ b/src/renderers/webgl/WebGLUniforms.js
@@ -245,7 +245,7 @@ function getSingularSetter( type ) {
 		case 0x8b5b: return setValue3fm; // _MAT3
 		case 0x8b5c: return setValue4fm; // _MAT4
 
-		case 0x8b5e: return setValueT1; // SAMPLER_2D
+		case 0x8b5e: case 0x8d66: return setValueT1; // SAMPLER_2D, SAMPLER_EXTERNAL_OES
 		case 0x8b60: return setValueT6; // SAMPLER_CUBE
 
 		case 0x1404: case 0x8b56: return setValue1i; // INT, BOOL