diff --git a/intl/chardet/src/makefile.win b/intl/chardet/src/makefile.win
index 69bd7a0744c..13c737a9ad0 100644
--- a/intl/chardet/src/makefile.win
+++ b/intl/chardet/src/makefile.win
@@ -35,6 +35,7 @@ CPPSRCS= \
          nsObserverBase.cpp \
          nsDetectionAdaptor.cpp \
          nsDebugDetector.cpp \
+         nsPSMDetectors.cpp \
 	$(NULL)
 
 CPP_OBJS= \
@@ -44,6 +45,7 @@ CPP_OBJS= \
         .\$(OBJDIR)\nsObserverBase.obj \
         .\$(OBJDIR)\nsDetectionAdaptor.obj \
         .\$(OBJDIR)\nsDebugDetector.obj \
+        .\$(OBJDIR)\nsPSMDetectors.obj \
 	$(NULL)
 
 MODULE=chardet