diff --git a/dom/canvas/WebGLFramebuffer.cpp b/dom/canvas/WebGLFramebuffer.cpp
index a5f8452cfef4..65513b5d80fc 100644
--- a/dom/canvas/WebGLFramebuffer.cpp
+++ b/dom/canvas/WebGLFramebuffer.cpp
@@ -268,6 +268,7 @@ WebGLContext::IsFormatValidForFB(GLenum sizedFormat) const
     case LOCAL_GL_RGBA4:
         return true;
 
+    case LOCAL_GL_SRGB8:
     case LOCAL_GL_SRGB8_ALPHA8_EXT:
         return IsExtensionEnabled(WebGLExtensionID::EXT_sRGB);