diff --git a/clang-tools-extra/clangd/ClangdLSPServer.cpp b/clang-tools-extra/clangd/ClangdLSPServer.cpp
--- a/clang-tools-extra/clangd/ClangdLSPServer.cpp
+++ b/clang-tools-extra/clangd/ClangdLSPServer.cpp
@@ -1606,7 +1606,7 @@
     if (Stats.Completed < Stats.Enqueued) {
       assert(Stats.Enqueued > Stats.LastIdle);
       WorkDoneProgressReport Report;
-      Report.percentage = 100.0 * (Stats.Completed - Stats.LastIdle) /
+      Report.percentage = 100 * (Stats.Completed - Stats.LastIdle) /
                           (Stats.Enqueued - Stats.LastIdle);
       Report.message =
           llvm::formatv("{0}/{1}", Stats.Completed - Stats.LastIdle,
diff --git a/clang-tools-extra/clangd/Protocol.h b/clang-tools-extra/clangd/Protocol.h
--- a/clang-tools-extra/clangd/Protocol.h
+++ b/clang-tools-extra/clangd/Protocol.h
@@ -631,7 +631,7 @@
   ///
   /// The value should be steadily rising. Clients are free to ignore values
   /// that are not following this rule.
-  llvm::Optional<double> percentage;
+  llvm::Optional<unsigned> percentage;
 };
 llvm::json::Value toJSON(const WorkDoneProgressReport &);
 //