diff --git a/PC/VC6/pythoncore.dsp b/PC/VC6/pythoncore.dsp
index 035a11da594..e919620000f 100644
--- a/PC/VC6/pythoncore.dsp
+++ b/PC/VC6/pythoncore.dsp
@@ -293,10 +293,6 @@ SOURCE=..\..\Modules\zlib\crc32.c
 # End Source File
 # Begin Source File
 
-SOURCE=..\..\Modules\cStringIO.c
-# End Source File
-# Begin Source File
-
 SOURCE=..\..\Modules\datetimemodule.c
 # End Source File
 # Begin Source File
diff --git a/PC/VS7.1/pythoncore.vcproj b/PC/VS7.1/pythoncore.vcproj
index 8692e7a36c5..4865e11a779 100644
--- a/PC/VS7.1/pythoncore.vcproj
+++ b/PC/VS7.1/pythoncore.vcproj
@@ -478,9 +478,6 @@
 		<File
 			RelativePath="..\..\PC\config.c">
 		</File>
-		<File
-			RelativePath="..\..\Modules\cStringIO.c">
-		</File>
 		<File
 			RelativePath="..\..\Modules\datetimemodule.c">
 		</File>
diff --git a/PC/VS8.0/pythoncore.vcproj b/PC/VS8.0/pythoncore.vcproj
index c2eb3561f7c..2d34d12485c 100644
--- a/PC/VS8.0/pythoncore.vcproj
+++ b/PC/VS8.0/pythoncore.vcproj
@@ -990,10 +990,10 @@
 				RelativePath="..\..\Modules\_fileio.c"
 				>
 			</File>
-                        <File^M
-                                RelativePath="..\..\Modules\_bytesio.c"^M
-                                >^M
-                        </File>^M
+                        <File^M
+                                RelativePath="..\..\Modules\_bytesio.c"^M
+                                >^M
+                        </File>^M
 			<File
 				RelativePath="..\..\Modules\_functoolsmodule.c"
 				>
@@ -1050,10 +1050,6 @@
 				RelativePath="..\..\Modules\cmathmodule.c"
 				>
 			</File>
-			<File
-				RelativePath="..\..\Modules\cStringIO.c"
-				>
-			</File>
 			<File
 				RelativePath="..\..\Modules\datetimemodule.c"
 				>
diff --git a/PC/config.c b/PC/config.c
index 23dbc6453f8..4269aa576bf 100644
--- a/PC/config.c
+++ b/PC/config.c
@@ -23,7 +23,6 @@ extern void init_sha256(void);
 extern void init_sha512(void);
 extern void inittime(void);
 extern void init_thread(void);
-extern void initcStringIO(void);
 #ifdef WIN32
 extern void initmsvcrt(void);
 extern void init_locale(void);
@@ -95,7 +94,6 @@ struct _inittab _PyImport_Inittab[] = {
 #ifdef WITH_THREAD
         {"_thread", init_thread},
 #endif
-        {"cStringIO", initcStringIO},
 #ifdef WIN32
         {"msvcrt", initmsvcrt},
         {"_locale", init_locale},
diff --git a/PC/os2emx/Makefile b/PC/os2emx/Makefile
index 10cadf950eb..8b4c404f561 100644
--- a/PC/os2emx/Makefile
+++ b/PC/os2emx/Makefile
@@ -287,7 +287,6 @@ SRC.MODULES=	$(addprefix $(TOP), \
 		Modules/cmathmodule.c \
 		Modules/_codecsmodule.c \
 		Modules/collectionsmodule.c \
-		Modules/cStringIO.c \
 		Modules/_csv.c \
 		Modules/datetimemodule.c \
 		Modules/errnomodule.c \
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index 5cb0e35ba0e..d8771159d0e 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -1054,10 +1054,6 @@
 				RelativePath="..\Modules\cmathmodule.c"
 				>
 			</File>
-			<File
-				RelativePath="..\Modules\cStringIO.c"
-				>
-			</File>
 			<File
 				RelativePath="..\Modules\datetimemodule.c"
 				>