diff --git a/src/gui/rhi/qrhigles2.cpp b/src/gui/rhi/qrhigles2.cpp
index 4cb37a4cd6..1a7be9eb49 100644
--- a/src/gui/rhi/qrhigles2.cpp
+++ b/src/gui/rhi/qrhigles2.cpp
@@ -741,8 +741,15 @@ bool QRhiGles2::create(QRhi::Flags flags)
     else
         caps.fixedIndexPrimitiveRestart = caps.ctxMajor > 4 || (caps.ctxMajor == 4 && caps.ctxMinor >= 3); // 4.3
 
-    if (caps.fixedIndexPrimitiveRestart)
+    if (caps.fixedIndexPrimitiveRestart) {
+#ifdef Q_OS_WASM
+        // WebGL 2 behaves as if GL_PRIMITIVE_RESTART_FIXED_INDEX was always
+        // enabled (i.e. matching D3D/Metal), and the value cannot be passed to
+        // glEnable, so skip the call.
+#else
         f->glEnable(GL_PRIMITIVE_RESTART_FIXED_INDEX);
+#endif
+    }
 
     caps.bgraExternalFormat = f->hasOpenGLExtension(QOpenGLExtensions::BGRATextureFormat);
     caps.bgraInternalFormat = caps.bgraExternalFormat && caps.gles;