diff --git a/src/plugins/projectexplorer/environment.cpp b/src/plugins/projectexplorer/environment.cpp
index 541445cf99e..e3e5e8e4b88 100644
--- a/src/plugins/projectexplorer/environment.cpp
+++ b/src/plugins/projectexplorer/environment.cpp
@@ -179,7 +179,7 @@ void Environment::clear()
     m_values.clear();
 }
 
-QString Environment::searchInPath(QString executable)
+QString Environment::searchInPath(QString executable) const
 {
 //    qDebug()<<"looking for "<<executable<< "in PATH: "<<m_values.value("PATH");
     if (executable.isEmpty())
diff --git a/src/plugins/projectexplorer/environment.h b/src/plugins/projectexplorer/environment.h
index 367aee5a802..e76ccc0cb99 100644
--- a/src/plugins/projectexplorer/environment.h
+++ b/src/plugins/projectexplorer/environment.h
@@ -83,7 +83,7 @@ public:
     Environment::const_iterator constBegin() const;
     Environment::const_iterator constEnd() const;
 
-    QString searchInPath(QString executable);
+    QString searchInPath(QString executable) const;
     QStringList path() const;
 
     static QStringList parseCombinedArgString(const QString &program);