diff --git a/string/memcmp.c b/string/memcmp.c
index 4fd2f83..82ad082 100644
--- a/string/memcmp.c
+++ b/string/memcmp.c
@@ -48,9 +48,6 @@
    and store.  Must be an unsigned type.  */
 # define OPSIZ	(sizeof(op_t))
 
-/* Threshold value for when to enter the unrolled loops.  */
-# define OP_T_THRES	16
-
 /* Type to use for unaligned operations.  */
 typedef unsigned char byte;
 
diff --git a/sysdeps/generic/memcopy.h b/sysdeps/generic/memcopy.h
index c7e9cc9..1698379 100644
--- a/sysdeps/generic/memcopy.h
+++ b/sysdeps/generic/memcopy.h
@@ -58,6 +58,7 @@
 
 /* Type to use for aligned memory operations.  */
 #include <string-optype.h>
+#include <string-opthr.h>
 
 #define OPSIZ	(sizeof(op_t))
 
@@ -190,9 +191,6 @@ extern void _wordcopy_bwd_dest_aligned (long int, long int, size_t)
 
 #endif
 
-/* Threshold value for when to enter the unrolled loops.  */
-#define	OP_T_THRES	16
-
 /* Set to 1 if memcpy is safe to use for forward-copying memmove with
    overlapping addresses.  This is 0 by default because memcpy implementations
    are generally not safe for overlapping addresses.  */
diff --git a/sysdeps/generic/string-opthr.h b/sysdeps/generic/string-opthr.h
new file mode 100644
index 0000000..17fa627
--- /dev/null
+++ b/sysdeps/generic/string-opthr.h
@@ -0,0 +1,25 @@
+/* Define a threshold for word access.  Generic version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef STRING_OPTHR_H
+#define STRING_OPTHR_H 1
+
+/* Threshold value for when to enter the unrolled loops.  */
+#define OP_T_THRES	16
+
+#endif /* string-opthr.h */
diff --git a/sysdeps/i386/memcopy.h b/sysdeps/i386/memcopy.h
index 12bb39f..28cee47 100644
--- a/sysdeps/i386/memcopy.h
+++ b/sysdeps/i386/memcopy.h
@@ -19,9 +19,6 @@
 
 #include <sysdeps/generic/memcopy.h>
 
-#undef	OP_T_THRES
-#define	OP_T_THRES	8
-
 #undef	BYTE_COPY_FWD
 #define BYTE_COPY_FWD(dst_bp, src_bp, nbytes)				      \
   do {									      \
diff --git a/sysdeps/i386/string-opthr.h b/sysdeps/i386/string-opthr.h
new file mode 100644
index 0000000..ed3e4b2
--- /dev/null
+++ b/sysdeps/i386/string-opthr.h
@@ -0,0 +1,25 @@
+/* Define a threshold for word access.  i386 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef I386_STRING_OPTHR_H
+#define I386_STRING_OPTHR_H 1
+
+/* Threshold value for when to enter the unrolled loops.  */
+#define OP_T_THRES	8
+
+#endif /* I386_STRING_OPTHR_H */
diff --git a/sysdeps/m68k/memcopy.h b/sysdeps/m68k/memcopy.h
index 58569c6..ee0c5fc 100644
--- a/sysdeps/m68k/memcopy.h
+++ b/sysdeps/m68k/memcopy.h
@@ -21,9 +21,6 @@
 
 #if	defined(__mc68020__) || defined(mc68020)
 
-#undef	OP_T_THRES
-#define	OP_T_THRES	16
-
 /* WORD_COPY_FWD and WORD_COPY_BWD are not symmetric on the 68020,
    because of its weird instruction overlap characteristics.  */
 
diff --git a/sysdeps/powerpc/powerpc32/power4/memcopy.h b/sysdeps/powerpc/powerpc32/power4/memcopy.h
index 8050abc..37ed40b 100644
--- a/sysdeps/powerpc/powerpc32/power4/memcopy.h
+++ b/sysdeps/powerpc/powerpc32/power4/memcopy.h
@@ -51,11 +51,6 @@
      [I fail to understand.  I feel stupid.  --roland]
 */
 
-
-/* Threshold value for when to enter the unrolled loops.  */
-#undef	OP_T_THRES
-#define OP_T_THRES 16
-
 /* Copy exactly NBYTES bytes from SRC_BP to DST_BP,
    without any assumptions about alignment of the pointers.  */
 #undef BYTE_COPY_FWD
