diff --git a/linuxthreads/sysdeps/unix/sysv/linux/sparc/Makefile b/linuxthreads/sysdeps/unix/sysv/linux/sparc/Makefile
index febed8c20e..a03d358672 100644
--- a/linuxthreads/sysdeps/unix/sysv/linux/sparc/Makefile
+++ b/linuxthreads/sysdeps/unix/sysv/linux/sparc/Makefile
@@ -6,6 +6,6 @@ before-compile += $(objpfx)specs
 generated += specs
 $(objpfx)specs:
 	$(CC) $(CFLAGS) $(CPPFLAGS) -dumpspecs \
-	  | sed 's,\(/usr/lib\(\|64\)/\|^\|\([^/a-z]\)\)\(crt[in]\.o\),\3./\4,g' > $@.new
+	  | sed 's~\(/usr/lib\(\|64\)/\|^\|\([^/a-z]\)\)\(crt[in]\.o\)~\3'$(objpfx)'\4~g' > $@.new
 	mv -f $@.new $@
 endif
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile b/linuxthreads/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile
new file mode 100644
index 0000000000..90203051ae
--- /dev/null
+++ b/linuxthreads/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile
@@ -0,0 +1,5 @@
+# glibc makefile fragment for linuxthreads on sparc/sparc64.
+
+ifeq ($(subdir),linuxthreads)
+libpthread-routines += ptw-sigprocmask
+endif