diff --git a/src/libs/cplusplus/pp-engine.cpp b/src/libs/cplusplus/pp-engine.cpp
index 6a6e5274272a28f6745a8de1a81e612bb8aeae40..806449959a4c7e309afa584f4d7f443aa0902e82 100644
--- a/src/libs/cplusplus/pp-engine.cpp
+++ b/src/libs/cplusplus/pp-engine.cpp
@@ -662,6 +662,21 @@ bool Preprocessor::markGeneratedTokens(bool markGeneratedTokens,
     return previous;
 }
 
+bool Preprocessor::maybeAfterComment() const
+{
+    unsigned endOfPreviousToken = 0;
+
+    if (_dot != _tokens.constBegin())
+        endOfPreviousToken = (_dot - 1)->end();
+
+    const char *start = _source.constBegin() + endOfPreviousToken;
+
+    if (*start == '/')
+        return true;
+
+    return false;
+}
+
 void Preprocessor::preprocess(const QString &fileName, const QByteArray &source,
                               QByteArray *result)
 {
@@ -710,7 +725,7 @@ void Preprocessor::preprocess(const QString &fileName, const QByteArray &source,
 
         } else {
 
-            if (_dot->f.whitespace) {
+            if (_dot->f.whitespace || maybeAfterComment()) {
                 unsigned endOfPreviousToken = 0;
 
                 if (_dot != _tokens.constBegin())
diff --git a/src/libs/cplusplus/pp-engine.h b/src/libs/cplusplus/pp-engine.h
index 596a223e0583ad358ec8e1388e03fe44579df37c..b75a5ab60e0fb364ab7b1909144db4e08d8c92b5 100644
--- a/src/libs/cplusplus/pp-engine.h
+++ b/src/libs/cplusplus/pp-engine.h
@@ -172,6 +172,7 @@ private:
     void out(const char *s);
 
     QString string(const char *first, int len) const;
+    bool maybeAfterComment() const;
 
 private:
     Client *client;