diff --git a/reactos/tools/rbuild/backend/mingw/mingw.cpp b/reactos/tools/rbuild/backend/mingw/mingw.cpp
index 55fca0dbb60..916108bc10d 100644
--- a/reactos/tools/rbuild/backend/mingw/mingw.cpp
+++ b/reactos/tools/rbuild/backend/mingw/mingw.cpp
@@ -522,6 +522,9 @@ MingwBackend::GenerateXmlBuildFilesMacro() const
 	          ProjectNode.GetProjectFilename ().c_str () );
 	string xmlbuildFilenames;
 	int numberOfExistingFiles = 0;
+	struct stat statbuf;
+	time_t SystemTime, lastWriteTime;
+
 	for ( size_t i = 0; i < ProjectNode.xmlbuildfiles.size (); i++ )
 	{
 		XMLInclude& xmlbuildfile = *ProjectNode.xmlbuildfiles[i];
@@ -530,6 +533,28 @@ MingwBackend::GenerateXmlBuildFilesMacro() const
 		numberOfExistingFiles++;
 		if ( xmlbuildFilenames.length () > 0 )
 			xmlbuildFilenames += " ";
+
+		FILE* f = fopen ( xmlbuildfile.topIncludeFilename.c_str (), "rb" );
+		if ( !f )
+		throw FileNotFoundException ( NormalizeFilename ( xmlbuildfile.topIncludeFilename ) );
+
+		if ( fstat ( fileno ( f ), &statbuf ) != 0 )
+		{
+			fclose ( f );
+			throw AccessDeniedException ( NormalizeFilename ( xmlbuildfile.topIncludeFilename ) );
+		}
+
+		lastWriteTime = statbuf.st_mtime;
+		SystemTime = time(NULL);
+
+		if (SystemTime != -1)
+		{
+			if (difftime (lastWriteTime, SystemTime) > 0)
+				throw InvalidDateException ( NormalizeFilename ( xmlbuildfile.topIncludeFilename ) );
+		}
+
+		fclose ( f );
+		
 		xmlbuildFilenames += NormalizeFilename ( xmlbuildfile.topIncludeFilename );
 		if ( numberOfExistingFiles % 5 == 4 || i == ProjectNode.xmlbuildfiles.size () - 1 )
 		{
diff --git a/reactos/tools/rbuild/exception.cpp b/reactos/tools/rbuild/exception.cpp
index 90a1478dda3..a375f984620 100644
--- a/reactos/tools/rbuild/exception.cpp
+++ b/reactos/tools/rbuild/exception.cpp
@@ -64,6 +64,13 @@ InvalidOperationException::InvalidOperationException (
 {
 }
 
+InvalidDateException::InvalidDateException ( const string& filename)
+	: Exception ( "File '%s' has an invalid date.",
+	             filename.c_str() )
+{
+	Filename = filename;
+}
+
 InvalidOperationException::InvalidOperationException (
 	const char* filename,
 	const int linenumber,
diff --git a/reactos/tools/rbuild/exception.h b/reactos/tools/rbuild/exception.h
index 82db9cb4051..3b1fbb5dda9 100644
--- a/reactos/tools/rbuild/exception.h
+++ b/reactos/tools/rbuild/exception.h
@@ -73,6 +73,12 @@ public:
 	std::string Filename;
 };
 
+class InvalidDateException : public Exception
+{
+public:
+	InvalidDateException ( const std::string& filename );
+	std::string Filename;
+};
 
 class RequiredAttributeNotFoundException : public XMLInvalidBuildFileException
 {