diff --git a/bfd/Makefile.in b/bfd/Makefile.in
index 57b8708eb4..dbb4651c67 100644
--- a/bfd/Makefile.in
+++ b/bfd/Makefile.in
@@ -178,9 +178,9 @@ BFD64_BACKENDS = \
 OPTIONAL_BACKENDS = \
 	aix386-core.o \
 	hpux-core.o \
+	irix-core.o \
 	lynx-core.o \
 	osf-core.o \
-	sco-core.o \
 	trad-core.o
 
 # These are defined by configure.in:
@@ -233,7 +233,8 @@ CFILES = libbfd.c opncls.c bfd.c archive.c targets.c cache.c \
 	 coff-alpha.c cpu-alpha.c \
 	 hp300bsd.c hp300hpux.c \
 	 i386lynx.c cf-i386lynx.c m68klynx.c cf-m68klynx.c \
-	 sparclynx.c cf-sparclynx.c
+	 sparclynx.c cf-sparclynx.c aix386-core.c hpux-core.c \
+	 irix-core.c lynx-core.c osf-core.c
 
 HFILES = aout-target.h aoutf1.h aoutx.h coffcode.h \
 	 coffswap.h ecoffswap.h elf32-hppa.h elf32-target.h elf64-target.h \
@@ -681,5 +682,11 @@ sparclynx.o : sparclynx.c $(INCDIR)/aout/sun4.h libaout.h \
 cf-sparclynx.o : cf-sparclynx.c coff-sparc.c $(INCDIR)/coff/sparc.h \
   $(INCDIR)/coff/internal.h libcoff.h coffcode.h seclet.h \
   coffswap.h
+aix386-core.o : aix386-core.c $(INCDIR)/coff/i386.h \
+  $(INCDIR)/coff/internal.h libcoff.h
+hpux-core.o : hpux-core.c
+irix-core.o : irix-core.c
+lynx-core.o : lynx-core.c
+osf-core.o : osf-core.c
 
 # IF YOU PUT ANYTHING HERE IT WILL GO AWAY
diff --git a/bfd/targets.c b/bfd/targets.c
index 53acd1348e..4023e4f85f 100644
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -397,9 +397,11 @@ extern bfd_target symbolsrec_vec;
 extern bfd_target aix386_core_vec;
 extern bfd_target hpux_core_vec;
 extern bfd_target hppabsd_core_vec;
+extern bfd_target irix_core_vec;
 extern bfd_target osf_core_vec;
 extern bfd_target sco_core_vec;
 extern bfd_target trad_core_vec;
+extern bfd_target ptrace_core_vec;
 
 bfd_target *target_vector[] = {
 
@@ -535,6 +537,9 @@ bfd_target *target_vector[] = {
 #ifdef HPPABSD_CORE
 	&hppabsd_core_vec,
 #endif
+#ifdef IRIX_CORE
+	&irix_core_vec,
+#endif
 #ifdef OSF_CORE
 	&osf_core_vec,
 #endif
@@ -542,6 +547,10 @@ bfd_target *target_vector[] = {
 	&trad_core_vec,
 #endif
 
+#ifdef	PTRACE_CORE
+	&ptrace_core_vec,
+#endif
+
 	NULL /* end of list marker */
 };