diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1479031..325887f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -63,8 +63,8 @@ jobs:
           cd ${{ github.workspace }}/pcireg
           wmake
           make -f Makefile.uefi ARCH=x86_64
-          make -f Makefile.gcc clean all CC=i686-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 DEST=pciregw
-          make -f Makefile.gcc clean all CC=x86_64-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 DEST=pciregw64
+          make -f Makefile.gcc clean all CC=i686-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 CP437_CONV=y DEST=pciregw
+          make -f Makefile.gcc clean all CC=x86_64-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 CP437_CONV=y DEST=pciregw64
           make -f Makefile.gcc clean all CC=i686-linux-gnu-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static
           python3 pciids.py
       - name: Build `usblgoff`
diff --git a/clib/clib_pci.c b/clib/clib_pci.c
index ed6a200..9b43451 100644
--- a/clib/clib_pci.c
+++ b/clib/clib_pci.c
@@ -19,6 +19,8 @@
 #    include <uefi.h>
 #else
 #    include <stdio.h>
+#    include <stdlib.h>
+#    include <string.h>
 #endif
 #include "clib_pci.h"
 #ifdef PCI_LIB_VERSION
diff --git a/clib/clib_term.c b/clib/clib_term.c
index a48f924..b1f4e8d 100644
--- a/clib/clib_term.c
+++ b/clib/clib_term.c
@@ -222,7 +222,7 @@ void
 term_unbuffer_stdout()
 {
 #ifdef _WIN32
-    SetConsoleOutputCP(65001);
+    SetConsoleOutputCP(437);
 #endif
 }
 
diff --git a/clib/gcc.mk b/clib/gcc.mk
index 3afd6e6..ed1d762 100644
--- a/clib/gcc.mk
+++ b/clib/gcc.mk
@@ -21,7 +21,13 @@ CC			?= "gcc"
 all: $(DEST)
 
 %.o: %.c $(HEADERS)
+ifeq "$(CP437_CONV)" "y"
+	../cp437/cp437 $<
+	$(CC) -I../clib $(CFLAGS) -x c -c $<_cp437 -o $@
+	-rm -f $<_cp437
+else
 	$(CC) -I../clib $(CFLAGS) -c $< -o $@
+endif
 
 $(DEST): $(OBJS)
 	$(CC) $(OBJS) $(LDFLAGS) $(LDAPPEND) -o $@
diff --git a/pcireg/README.md b/pcireg/README.md
index 76fdada..8fca133 100644
--- a/pcireg/README.md
+++ b/pcireg/README.md
@@ -53,7 +53,7 @@ Building
   make CROSS_COMPILE=i686-w64-mingw32- HOST=i586-windows ZLIB=no DNS=no SHARED=no IDSDIR=""
   sudo make install-lib PREFIX=/usr/i686-w64-mingw32
   cd ..
-  make -f Makefile.gcc CC=i686-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 DEST=pciregw
+  make -f Makefile.gcc CC=i686-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 CP437_CONV=y DEST=pciregw
   ```
   * 64-bit:
   ```
@@ -62,7 +62,7 @@ Building
   make CROSS_COMPILE=x86_64-w64-mingw32- HOST=x86_64-windows ZLIB=no DNS=no SHARED=no IDSDIR=""
   sudo make install-lib PREFIX=/usr/x86_64-w64-mingw32
   cd ..
-  make -f Makefile.gcc CC=x86_64-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 DEST=pciregw64
+  make -f Makefile.gcc CC=x86_64-w64-mingw32-gcc CFLAGS=-I/usr/local/include LDFLAGS=-static LDAPPEND=-lcfgmgr32 CP437_CONV=y DEST=pciregw64
   ```
 
 ### Linux target