1 files changed, 5 insertions, 1 deletions
diff --git a/src/main/java/org/anarres/cpp/MacroTokenSource.java b/src/main/java/org/anarres/cpp/MacroTokenSource.java
index 5874584..07c388c 100644
--- a/src/main/java/org/anarres/cpp/MacroTokenSource.java
+++ b/src/main/java/org/anarres/cpp/MacroTokenSource.java
@@ -78,9 +78,13 @@ import static org.anarres.cpp.Token.*;
 
     private void concat(StringBuilder buf, Argument arg) {
         Iterator<Token> it = arg.iterator();
+        boolean newline = false;
         while (it.hasNext()) {
             Token tok = it.next();
-            buf.append(tok.getText());
+            String text = tok.getText();
+            if (text.contains("\n")) newline = true;
+            if (newline) text = text.trim();
+            buf.append(text);
         }
     }