diff --git a/src/libs/utils/outputformatter.cpp b/src/libs/utils/outputformatter.cpp
index 0ca2e495d0c..cf8e0210853 100644
--- a/src/libs/utils/outputformatter.cpp
+++ b/src/libs/utils/outputformatter.cpp
@@ -134,7 +134,7 @@ bool OutputLineParser::demoteErrorsToWarnings() const
     return d->demoteErrorsToWarnings;
 }
 
-FilePath OutputLineParser::absoluteFilePath(const FilePath &filePath)
+FilePath OutputLineParser::absoluteFilePath(const FilePath &filePath) const
 {
     if (filePath.isEmpty() || filePath.toFileInfo().isAbsolute())
         return filePath;
diff --git a/src/libs/utils/outputformatter.h b/src/libs/utils/outputformatter.h
index 7f7e0c87371..89af3de113f 100644
--- a/src/libs/utils/outputformatter.h
+++ b/src/libs/utils/outputformatter.h
@@ -102,7 +102,7 @@ public:
 
 protected:
     static QString rightTrimmed(const QString &in);
-    Utils::FilePath absoluteFilePath(const Utils::FilePath &filePath);
+    Utils::FilePath absoluteFilePath(const Utils::FilePath &filePath) const;
     static QString createLinkTarget(const FilePath &filePath, int line, int column);
     static void addLinkSpecForAbsoluteFilePath(LinkSpecs &linkSpecs, const FilePath &filePath,
                                                int lineNo, int pos, int len);