diff --git a/GCodes.cpp b/GCodes.cpp
index 1c3dadc..84010c9 100644
--- a/GCodes.cpp
+++ b/GCodes.cpp
@@ -3249,7 +3249,7 @@ bool GCodes::HandleMcode(GCodeBuffer* gb)
 			}
 			else
 			{
-				reply.printf("A %d sends drive %d forwards.", (int)platform->GetDirectionValue(drive), drive);
+				reply.printf("A %d sends drive %d forwards.\n", (int)platform->GetDirectionValue(drive), drive);
 			}
 		}
 		break;
diff --git a/RepRapFirmware.h b/RepRapFirmware.h
index 284b39c..91d2c22 100644
--- a/RepRapFirmware.h
+++ b/RepRapFirmware.h
@@ -64,6 +64,7 @@ int StringContains(const char* string, const char* match);
 #else
 // This version relies on a gcc extension that is available only in older compilers
 #define ARRAY_INIT(_dest, _init) _dest = _init
+#define nullptr		(0)
 #endif
 
 // Class to describe a string buffer, including its length. This saves passing buffer lengths around everywhere.