diff --git a/src/plugins/cppeditor/cppeditor.cpp b/src/plugins/cppeditor/cppeditor.cpp
index 420d64fbc38..bc07e4ffbc8 100644
--- a/src/plugins/cppeditor/cppeditor.cpp
+++ b/src/plugins/cppeditor/cppeditor.cpp
@@ -2159,7 +2159,7 @@ SemanticInfo SemanticHighlighter::semanticInfo(const Source &source)
 
     m_mutex.lock();
     if (! source.force
-            && m_lastSemanticInfo.revision == (unsigned)source.revision
+            && m_lastSemanticInfo.revision == source.revision
             && m_lastSemanticInfo.doc
             && m_lastSemanticInfo.doc->translationUnit()->ast()
             && m_lastSemanticInfo.doc->fileName() == source.fileName) {
diff --git a/src/plugins/cppeditor/cppeditor.h b/src/plugins/cppeditor/cppeditor.h
index 6b7cc87de12..a90026fcf40 100644
--- a/src/plugins/cppeditor/cppeditor.h
+++ b/src/plugins/cppeditor/cppeditor.h
@@ -92,7 +92,7 @@ public:
         QString code;
         int line;
         int column;
-        int revision;
+        unsigned revision;
         bool force;
 
         Source()
@@ -103,7 +103,7 @@ public:
                const QString &fileName,
                const QString &code,
                int line, int column,
-               int revision)
+               unsigned revision)
             : snapshot(snapshot), fileName(fileName),
               code(code), line(line), column(column),
               revision(revision), force(false)