diff --git a/src/libs/clangbackendipc/clangcodemodelconnectionclient.cpp b/src/libs/clangbackendipc/clangcodemodelconnectionclient.cpp
index 9263fa44460..ed969ec83e7 100644
--- a/src/libs/clangbackendipc/clangcodemodelconnectionclient.cpp
+++ b/src/libs/clangbackendipc/clangcodemodelconnectionclient.cpp
@@ -43,8 +43,8 @@ ClangCodeModelConnectionClient::ClangCodeModelConnectionClient(
         ClangCodeModelClientInterface *client)
     : serverProxy_(client, ioDevice())
 {
-    stdErrPrefixer().setPrefix("ClangCodeModelConnectionClient.error:");
-    stdOutPrefixer().setPrefix("ClangCodeModelConnectionClient.out:");
+    stdErrPrefixer().setPrefix("ClangCodeModelConnectionClient.stderr: ");
+    stdOutPrefixer().setPrefix("ClangCodeModelConnectionClient.stdout: ");
 }
 
 ClangCodeModelConnectionClient::~ClangCodeModelConnectionClient()
diff --git a/src/plugins/clangrefactoring/refactoringconnectionclient.cpp b/src/plugins/clangrefactoring/refactoringconnectionclient.cpp
index 2d05722b194..cc9283c581f 100644
--- a/src/plugins/clangrefactoring/refactoringconnectionclient.cpp
+++ b/src/plugins/clangrefactoring/refactoringconnectionclient.cpp
@@ -42,8 +42,8 @@ QString currentProcessId()
 RefactoringConnectionClient::RefactoringConnectionClient(RefactoringClientInterface *client)
     : serverProxy_(client, ioDevice())
 {
-    stdErrPrefixer().setPrefix("RefactoringConnectionClient.error:");
-    stdOutPrefixer().setPrefix("RefactoringConnectionClient.out:");
+    stdErrPrefixer().setPrefix("RefactoringConnectionClient.stderr: ");
+    stdOutPrefixer().setPrefix("RefactoringConnectionClient.stdout: ");
 }
 
 RefactoringServerProxy &RefactoringConnectionClient::serverProxy()