diff --git a/visualc/VS6/polarssl.dsp b/visualc/VS6/polarssl.dsp
index 38b33f8..205dfd6 100644
--- a/visualc/VS6/polarssl.dsp
+++ b/visualc/VS6/polarssl.dsp
@@ -413,6 +413,10 @@
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\include\polarssl\check_config.h
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\include\polarssl\ctr_drbg.h
 # End Source File
 # Begin Source File