diff --git a/interpreter/cling/lib/Interpreter/IncrementalParser.cpp b/interpreter/cling/lib/Interpreter/IncrementalParser.cpp
index ad41d4bc07281..3430ccd0e9282 100644
--- a/interpreter/cling/lib/Interpreter/IncrementalParser.cpp
+++ b/interpreter/cling/lib/Interpreter/IncrementalParser.cpp
@@ -675,7 +675,7 @@ namespace cling {
                                                    source_name.str()));
     char* MBStart = const_cast<char*>(MB->getBufferStart());
     memcpy(MBStart, input.data(), InputSize);
-    memcpy(MBStart + InputSize, "\n", 2);
+    MBStart[InputSize] = '\n';
 
     SourceManager& SM = getCI()->getSourceManager();