diff --git a/src/host/sources.inc b/src/host/sources.inc
index a50292e48..3ee3b70c3 100644
--- a/src/host/sources.inc
+++ b/src/host/sources.inc
@@ -12,12 +12,6 @@
 # of capturing user-interaction (input) on behalf of the hosted application.
 
 
-# -------------------------------------
-# Preprocessor Settings
-# -------------------------------------
-
-C_DEFINES               = $(C_DEFINES) -DFE_IME
-
 # -------------------------------------
 # Compiler Settings
 # -------------------------------------
@@ -38,7 +32,6 @@ TARGET_DESTINATION      = retail
 # Code in the OneCore depot automatically excludes default Win32 libraries.
 
 # Defines IME and Codepage support
-W32_SB                  = 1
 
 
 # -------------------------------------
diff --git a/src/interactivity/base/sources.inc b/src/interactivity/base/sources.inc
index 9521ea7c0..00bfdaf13 100644
--- a/src/interactivity/base/sources.inc
+++ b/src/interactivity/base/sources.inc
@@ -28,9 +28,6 @@ MSC_WARNING_LEVEL       = $(MSC_WARNING_LEVEL) /wd4201
 
 # Code in the OneCore depot automatically excludes default Win32 libraries.
 
-# Defines IME and Codepage support
-W32_SB                  = 1
-
 # -------------------------------------
 # Sources, Headers, and Libraries
 # -------------------------------------
diff --git a/src/interactivity/win32/sources.inc b/src/interactivity/win32/sources.inc
index 266b5d222..25d12cc06 100644
--- a/src/interactivity/win32/sources.inc
+++ b/src/interactivity/win32/sources.inc
@@ -28,7 +28,6 @@ MSC_WARNING_LEVEL       = $(MSC_WARNING_LEVEL) /wd4201
 # Code in the OneCore depot automatically excludes default Win32 libraries.
 
 # Defines IME and Codepage support
-W32_SB                  = 1
 
 # -------------------------------------
 # Sources, Headers, and Libraries
diff --git a/src/propsheet/sources b/src/propsheet/sources
index 4a01d89ef..648dd1d1c 100644
--- a/src/propsheet/sources
+++ b/src/propsheet/sources
@@ -40,7 +40,6 @@ MSC_WARNING_LEVEL       = /W3 /WX
 # Code in the OneCore depot automatically excludes default Win32 libraries.
 
 # Defines IME and Codepage support
-W32_SB                  = 1
 
 # -------------------------------------
 # Sources, Headers, and Libraries
diff --git a/src/propslib/sources b/src/propslib/sources
index 0c57c9363..8a6650f92 100644
--- a/src/propslib/sources
+++ b/src/propslib/sources
@@ -32,7 +32,6 @@ C_DEFINES               = $(C_DEFINES) -DNT -DWIN32
 # Code in the OneCore depot automatically excludes default Win32 libraries.
 
 # Defines IME and Codepage support
-W32_SB                  = 1
 
 # -------------------------------------
 # Sources, Headers, and Libraries
diff --git a/src/tsf/sources b/src/tsf/sources
index 901c4ba93..d18e015d2 100644
--- a/src/tsf/sources
+++ b/src/tsf/sources
@@ -31,7 +31,6 @@ C_DEFINES               = $(C_DEFINES) -DWIN32 -DNT
 # Code in the OneCore depot automatically excludes default Win32 libraries.
 
 # Defines IME and Codepage support
-W32_SB                  = 1
 
 # -------------------------------------
 # Sources, Headers, and Libraries