diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 60e22b59300..ba9b60a4593 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec 18 00:19:38 1997  Robert Lipe <robertl@dgii.com>
+
+	* i386/x-sco5 (CLIB) Deleted.  (ALLOCA) Added.
+	* i386/xm-sco5.h  (USE_C_ALLOCA) Added.
+
 Tue Dec 16 18:51:00 1997  Bill Moyer <billm@cygnus.com>
 	 
         * config/m68k/m68k.c (output_function_prologue): Typecast
diff --git a/gcc/config/i386/x-sco5 b/gcc/config/i386/x-sco5
index ada44eda382..276d74045ed 100644
--- a/gcc/config/i386/x-sco5
+++ b/gcc/config/i386/x-sco5
@@ -3,7 +3,8 @@ RANLIB_TEST = false
 CC = cc 
 OLDCC = cc
 CCLIBFLAGS =
-CLIB = -lPW
+# We avoid the ALLOCA in -lPW becuase it gives us an evil index()
+ALLOCA = alloca.o
 
 # See all the declarations.
 FIXPROTO_DEFINES = -D_XOPEN_SOURCE -D_POSIX_C_SOURCE=2
diff --git a/gcc/config/i386/xm-sco5.h b/gcc/config/i386/xm-sco5.h
index 78c66a87bc5..99bc53c2bc5 100644
--- a/gcc/config/i386/xm-sco5.h
+++ b/gcc/config/i386/xm-sco5.h
@@ -10,3 +10,9 @@
 #define sys_siglist _sys_siglist
 #undef SYS_SIGLIST_DECLARED
 #define SYS_SIGLIST_DECLARED
+
+/* If not compiled with GNU C, use the portable alloca.  */
+#ifndef __GNUC__
+#define USE_C_ALLOCA
+#endif
+