diff --git a/gcc/config/i386/sco.h b/gcc/config/i386/sco.h
index 8f1c8a0533a..a14a5e2949b 100644
--- a/gcc/config/i386/sco.h
+++ b/gcc/config/i386/sco.h
@@ -19,7 +19,8 @@
 /* Use crt1.o as a startup file and crtn.o as a closing file.  */
 
 #undef STARTFILE_SPEC
-#define STARTFILE_SPEC  "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"
+#define STARTFILE_SPEC \
+ "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"
 
 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 
@@ -37,6 +38,17 @@
 #undef CPP_SPEC
 #define CPP_SPEC "%{scointl:-DM_INTERNAT}"
 
+/* This spec is used for telling cpp whether char is signed or not.  */
+
+#undef SIGNED_CHAR_SPEC
+#if DEFAULT_SIGNED_CHAR
+#define SIGNED_CHAR_SPEC \
+ "%{funsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
+#else
+#define SIGNED_CHAR_SPEC \
+ "%{!fsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
+#endif
+
 /* Use atexit for static destructors, instead of defining
    our own exit function.  */
 #define HAVE_ATEXIT