diff --git a/mozilla/intl/chardet/src/makefile.win b/mozilla/intl/chardet/src/makefile.win
index 7aa38294150..9095b8c2e5b 100644
--- a/mozilla/intl/chardet/src/makefile.win
+++ b/mozilla/intl/chardet/src/makefile.win
@@ -21,7 +21,7 @@ LCFLAGS= $(LCFLAGS) -D__STDC__
 
 DEFINES= -DWIN32_LEAN_AND_MEAN
 LIBRARY_NAME= chardet
-!if "$(_MSC_VER)" != "1100"
+!if "$(_MSC_VER)" != "" && "$(_MSC_VER)" != "1100"
 DIRS = windows
 !endif