diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index fb2581dfd..46a61613a 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -427,7 +427,7 @@ void cmNinjaTargetGenerator::WriteCompileRule(const std::string& lang)
         : mf->GetSafeDefinition("CMAKE_CXX_COMPILER");
       cldeps = "\"";
       cldeps += cmSystemTools::GetCMClDepsCommand();
-      cldeps += "\" " + lang + " $in \"$DEP_FILE\" $out \"";
+      cldeps += "\" " + lang + " " + vars.Source + " \"$DEP_FILE\" $out \"";
       cldeps += mf->GetSafeDefinition("CMAKE_CL_SHOWINCLUDES_PREFIX");
       cldeps += "\" \"" + cl + "\" ";
     }