diff --git a/src/renderers/webgl-fallback/utils/WebGLTextureUtils.js b/src/renderers/webgl-fallback/utils/WebGLTextureUtils.js
index 3ec991ce4dd0be..cd58e2e1fc4024 100644
--- a/src/renderers/webgl-fallback/utils/WebGLTextureUtils.js
+++ b/src/renderers/webgl-fallback/utils/WebGLTextureUtils.js
@@ -445,8 +445,7 @@ class WebGLTextureUtils {
 
 						if ( glFormat !== null ) {
 
-							gl.compressedTexSubImage3D( gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, mipmap.data, 0, 0 );
-
+							gl.compressedTexSubImage3D( gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, mipmap.data );
 
 						} else {
 
diff --git a/src/renderers/webgl/WebGLTextures.js b/src/renderers/webgl/WebGLTextures.js
index 9da19d2cb530b5..5663c8e8affb88 100644
--- a/src/renderers/webgl/WebGLTextures.js
+++ b/src/renderers/webgl/WebGLTextures.js
@@ -885,7 +885,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 													layerIndex * layerByteLength / mipmap.data.BYTES_PER_ELEMENT,
 													( layerIndex + 1 ) * layerByteLength / mipmap.data.BYTES_PER_ELEMENT
 												);
-												state.compressedTexSubImage3D( _gl.TEXTURE_2D_ARRAY, i, 0, 0, layerIndex, mipmap.width, mipmap.height, 1, glFormat, layerData, 0, 0 );
+												state.compressedTexSubImage3D( _gl.TEXTURE_2D_ARRAY, i, 0, 0, layerIndex, mipmap.width, mipmap.height, 1, glFormat, layerData );
 
 											}
 
@@ -893,7 +893,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 
 										} else {
 
-											state.compressedTexSubImage3D( _gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, mipmap.data, 0, 0 );
+											state.compressedTexSubImage3D( _gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, mipmap.data );
 
 										}