diff --git a/mlir/lib/Tools/mlir-pdll-lsp-server/LSPServer.cpp b/mlir/lib/Tools/mlir-pdll-lsp-server/LSPServer.cpp
index 311f6042ae83..5f4967ffb8e3 100644
--- a/mlir/lib/Tools/mlir-pdll-lsp-server/LSPServer.cpp
+++ b/mlir/lib/Tools/mlir-pdll-lsp-server/LSPServer.cpp
@@ -115,9 +115,9 @@ void LSPServer::onInitialize(const InitializeParams &params,
       {"completionProvider",
        llvm::json::Object{
            {"allCommitCharacters",
-            {" ", "\t", "(", ")", "[", "]", "{",  "}", "<",
-             ">", ":",  ";", ",", "+", "-", "/",  "*", "%",
-             "^", "&",  "#", "?", ".", "=", "\"", "'", "|"}},
+            {"\t", "(", ")", "[", "]", "{",  "}", "<", ">",
+             ":",  ";", ",", "+", "-", "/",  "*", "%", "^",
+             "&",  "#", "?", ".", "=", "\"", "'", "|"}},
            {"resolveProvider", false},
            {"triggerCharacters",
             {".", ">", "(", "{", ",", "<", ":", "[", " ", "\"", "/"}},