diff --git a/Mkfiles/vc/genmodule/genmodule.vcproj b/Mkfiles/vc/genmodule/genmodule.vcproj
index 01e9ae6a..0cd85b27 100644
--- a/Mkfiles/vc/genmodule/genmodule.vcproj
+++ b/Mkfiles/vc/genmodule/genmodule.vcproj
@@ -19,7 +19,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE"
+				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;FILTERMODE"
 				MinimalRebuild="TRUE"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="5"
diff --git a/libyasm/genmodule.c b/libyasm/genmodule.c
index 9b8524f3..03fa6128 100644
--- a/libyasm/genmodule.c
+++ b/libyasm/genmodule.c
@@ -99,6 +99,7 @@ main(int argc, char *argv[])
 	return EXIT_FAILURE;
     }
 
+    len = 0;
     while (fgets(str, MAXLINE, in)) {
 	if (strncmp(str, "MODULES_", 8) == 0) {
 	    len = 0;