diff --git a/virtualsmartcard/win32/BixVReader/Win7/sources b/virtualsmartcard/win32/BixVReader/Win7/sources
index 7869de7..7a49482 100644
--- a/virtualsmartcard/win32/BixVReader/Win7/sources
+++ b/virtualsmartcard/win32/BixVReader/Win7/sources
@@ -51,7 +51,7 @@ INCLUDES= $(INCLUDES);                  \
           $(DDK_INC_PATH);              \
           $(UMDF_INC_PATH)\10; 
           
-MSC_WARNING_LEVEL=/W4 /WX
+MSC_WARNING_LEVEL=/W4
 
 TARGETLIBS=\
         $(SDK_LIB_PATH)\strsafe.lib     \
diff --git a/virtualsmartcard/win32/BixVReader/WinXP/sources b/virtualsmartcard/win32/BixVReader/WinXP/sources
index 4f3e78f..02075d2 100644
--- a/virtualsmartcard/win32/BixVReader/WinXP/sources
+++ b/virtualsmartcard/win32/BixVReader/WinXP/sources
@@ -51,7 +51,7 @@ INCLUDES= $(INCLUDES);                  \
           $(DDK_INC_PATH);              \
           $(UMDF_INC_PATH)\10; 
           
-MSC_WARNING_LEVEL=/W4 /WX
+MSC_WARNING_LEVEL=/W4
 
 TARGETLIBS=\
         $(SDK_LIB_PATH)\strsafe.lib     \