diff --git a/src/libANGLE/renderer/gl/BlitGL.cpp b/src/libANGLE/renderer/gl/BlitGL.cpp
index 4901801bb7..fc2d0d959f 100644
--- a/src/libANGLE/renderer/gl/BlitGL.cpp
+++ b/src/libANGLE/renderer/gl/BlitGL.cpp
@@ -1078,7 +1078,29 @@ angle::Result BlitGL::clearRenderbuffer(const gl::Context *context,
                      mFunctions->framebufferRenderbuffer(
                          GL_FRAMEBUFFER, bindTarget, GL_RENDERBUFFER, source->getRenderbufferID()));
     }
-    ANGLE_GL_TRY(context, mFunctions->clear(clearMask));
+
+    // glClear's effect on integer color buffers is undefined (GL/ES spec); use
+    // glClearBuffer{i,ui}v for integer-format color renderbuffers so that
+    // robust-resource-init actually zeroes them.
+    const gl::InternalFormat &internalFormatInfo =
+        gl::GetSizedInternalFormatInfo(sizedInternalFormat);
+    if ((clearMask & GL_COLOR_BUFFER_BIT) && internalFormatInfo.componentType == GL_INT)
+    {
+        constexpr GLint kZero[4] = {0, 0, 0, 0};
+        ANGLE_GL_TRY(context, mFunctions->clearBufferiv(GL_COLOR, 0, kZero));
+        clearMask &= ~static_cast<GLbitfield>(GL_COLOR_BUFFER_BIT);
+    }
+    else if ((clearMask & GL_COLOR_BUFFER_BIT) &&
+             internalFormatInfo.componentType == GL_UNSIGNED_INT)
+    {
+        constexpr GLuint kZero[4] = {0, 0, 0, 0};
+        ANGLE_GL_TRY(context, mFunctions->clearBufferuiv(GL_COLOR, 0, kZero));
+        clearMask &= ~static_cast<GLbitfield>(GL_COLOR_BUFFER_BIT);
+    }
+    if (clearMask != 0)
+    {
+        ANGLE_GL_TRY(context, mFunctions->clear(clearMask));
+    }
 
     // Unbind
     for (GLenum bindTarget : bindTargets)