diff --git a/icu4c/source/common/common.dsp b/icu4c/source/common/common.dsp
index 08884084d0..487f73510c 100644
--- a/icu4c/source/common/common.dsp
+++ b/icu4c/source/common/common.dsp
@@ -43,8 +43,7 @@ RSC=rc.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "COMMON_EXPORTS" /YX /FD /c
-# ADD CPP /nologo /G6 /MD /Za /W3 /GX /Zi /O2 /Ob2 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "COMMON_EXPORTS" /D "U_COMMON_IMPLEMENTATION" /D "UDATA_STATIC_LIB" /FD /c
-# SUBTRACT CPP /YX
+# ADD CPP /nologo /G6 /MD /Za /W3 /GX /Zi /O2 /Ob2 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "COMMON_EXPORTS" /D "U_COMMON_IMPLEMENTATION" /D "UDATA_STATIC_LIB" /FD /GF /c
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
@@ -71,8 +70,7 @@ LINK32=link.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "COMMON_EXPORTS" /YX /FD /GZ /c
-# ADD CPP /nologo /MDd /Za /W3 /Gm /GX /ZI /Od /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "COMMON_EXPORTS" /D "U_COMMON_IMPLEMENTATION" /D "UDATA_STATIC_LIB" /FR /YX /FD /GZ /c
-# SUBTRACT CPP /WX
+# ADD CPP /nologo /MDd /Za /W3 /Gm /GX /ZI /Od /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "COMMON_EXPORTS" /D "U_COMMON_IMPLEMENTATION" /D "UDATA_STATIC_LIB" /FR /YX /FD /GF /GZ /c
 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
diff --git a/icu4c/source/extra/ustdio/ustdio.dsp b/icu4c/source/extra/ustdio/ustdio.dsp
index 1a1921aef2..fc4a148741 100644
--- a/icu4c/source/extra/ustdio/ustdio.dsp
+++ b/icu4c/source/extra/ustdio/ustdio.dsp
@@ -43,8 +43,7 @@ RSC=rc.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "USTDIO_EXPORTS" /YX /FD /c
-# ADD CPP /nologo /G6 /MD /W3 /GX /O2 /Ob2 /I "..\..\..\include" /I "..\..\common" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "USTDIO_EXPORTS" /D "U_USTDIO_IMPLEMENTATION" /YX /FD /c
-# SUBTRACT CPP /X
+# ADD CPP /nologo /G6 /MD /W3 /GX /O2 /Ob2 /I "..\..\..\include" /I "..\..\common" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "USTDIO_EXPORTS" /D "U_USTDIO_IMPLEMENTATION" /YX /FD /GF /c
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
@@ -71,7 +70,7 @@ LINK32=link.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "USTDIO_EXPORTS" /YX /FD /GZ /c
-# ADD CPP /nologo /MDd /W3 /Gm /GX /ZI /Od /I "..\..\..\include" /I "..\..\common" /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "USTDIO_EXPORTS" /D "U_USTDIO_IMPLEMENTATION" /FR /YX /FD /GZ /c
+# ADD CPP /nologo /MDd /W3 /Gm /GX /ZI /Od /I "..\..\..\include" /I "..\..\common" /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "USTDIO_EXPORTS" /D "U_USTDIO_IMPLEMENTATION" /FR /YX /FD /GF /GZ /c
 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
diff --git a/icu4c/source/i18n/i18n.dsp b/icu4c/source/i18n/i18n.dsp
index 42b2c3149c..444df9ff15 100644
--- a/icu4c/source/i18n/i18n.dsp
+++ b/icu4c/source/i18n/i18n.dsp
@@ -43,7 +43,7 @@ RSC=rc.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "I18N_EXPORTS" /YX /FD /c
-# ADD CPP /nologo /G6 /MD /Za /W3 /GX /Zi /O2 /Ob2 /I "..\..\include" /I "..\..\source\common" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "I18N_EXPORTS" /D "U_I18N_IMPLEMENTATION" /FR /YX /FD /c
+# ADD CPP /nologo /G6 /MD /Za /W3 /GX /Zi /O2 /Ob2 /I "..\..\include" /I "..\..\source\common" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "I18N_EXPORTS" /D "U_I18N_IMPLEMENTATION" /FR /YX /FD /GF /c
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
@@ -70,7 +70,7 @@ LINK32=link.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "I18N_EXPORTS" /YX /FD /GZ /c
-# ADD CPP /nologo /G6 /MDd /Za /W3 /Gm /GX /ZI /Od /I "..\..\include" /I "..\..\source\common" /D "_WINDOWS" /D "_USRDLL" /D "I18N_EXPORTS" /D "U_I18N_IMPLEMENTATION" /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "UDATA_MAP" /FR /YX /FD /GZ /c
+# ADD CPP /nologo /G6 /MDd /Za /W3 /Gm /GX /ZI /Od /I "..\..\include" /I "..\..\source\common" /D "_WINDOWS" /D "_USRDLL" /D "I18N_EXPORTS" /D "U_I18N_IMPLEMENTATION" /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "UDATA_MAP" /FR /YX /FD /GF /GZ /c
 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD BASE RSC /l 0x409 /d "_DEBUG"