diff --git a/src/renderers/webgl/WebGLProgram.js b/src/renderers/webgl/WebGLProgram.js
index 660810cbf5..7875a98cf4 100644
--- a/src/renderers/webgl/WebGLProgram.js
+++ b/src/renderers/webgl/WebGLProgram.js
@@ -839,7 +839,7 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 		if ( cachedUniforms === undefined ) {
 
 			// Populates cachedUniforms and cachedAttributes
-			onFirstUse();
+			onFirstUse.call( this );
 
 		}
 
@@ -856,7 +856,7 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 		if ( cachedAttributes === undefined ) {
 
 			// Populates cachedAttributes and cachedUniforms
-			onFirstUse();
+			onFirstUse.call( this );
 
 		}