diff --git a/GCodes.cpp b/GCodes.cpp
index 9615c65..1a472dd 100644
--- a/GCodes.cpp
+++ b/GCodes.cpp
@@ -741,6 +741,7 @@ bool GCodes::DoSingleZProbe()
 	{
 		cannedCycleMoveCount = 0;
 		probeCount = 0;
+		axisIsHomed[2] = true;	// we have homed the Z axis
 		return true;
 	}
 	return false;