diff --git a/server.go b/server.go
index 9240746..5562da3 100644
--- a/server.go
+++ b/server.go
@@ -88,6 +88,14 @@ func (h *handlerServer) GetPageInfo(abspath, relpath string, mode PageInfoMode,
 		return ioutil.NopCloser(bytes.NewReader(data)), nil
 	}
 
+	// Make the syscall/js package always visible by default.
+	// It defaults to the host's GOOS/GOARCH, and golang.org's
+	// linux/amd64 means the wasm syscall/js package was blank.
+	// And you can't run godoc on js/wasm anyway, so host defaults
+	// don't make sense here.
+	if goos == "" && goarch == "" && relpath == "syscall/js" {
+		goos, goarch = "js", "wasm"
+	}
 	if goos != "" {
 		ctxt.GOOS = goos
 	}