diff --git a/src/plugins/cpptools/compileroptionsbuilder.cpp b/src/plugins/cpptools/compileroptionsbuilder.cpp
index 6a11f2f04c4..d5a3a53043b 100644
--- a/src/plugins/cpptools/compileroptionsbuilder.cpp
+++ b/src/plugins/cpptools/compileroptionsbuilder.cpp
@@ -192,8 +192,8 @@ static QStringList createLanguageOptionGcc(ProjectFile::Kind fileKind, bool objc
 void CompilerOptionsBuilder::addWordWidth()
 {
     const QString argument = m_projectPart.toolChainWordWidth == ProjectPart::WordWidth64Bit
-                                 ? "-m64"
-                                 : "-m32";
+                                 ? QLatin1String("-m64")
+                                 : QLatin1String("-m32");
     add(argument);
 }