diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 34fe174cb2..e6d86e2552 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2019-02-14  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* config/i386/nm-i386gnu.h (gnu_target_pid_to_str): Remove.
+
 2019-02-14  Frederic Konrad  <konrad@adacore.com>
 
 	* riscv-rdep.c (riscv_type_alignment): Handle TYPE_CODE_RANGE.
diff --git a/gdb/config/i386/nm-i386gnu.h b/gdb/config/i386/nm-i386gnu.h
index 99f3fc79a0..8f36102da4 100644
--- a/gdb/config/i386/nm-i386gnu.h
+++ b/gdb/config/i386/nm-i386gnu.h
@@ -24,8 +24,6 @@
 #include <mach/exception.h>
 #include "regcache.h"
 
-extern char *gnu_target_pid_to_str (int pid);
-
 /* Thread flavors used in re-setting the T bit.  */
 #define THREAD_STATE_FLAVOR		i386_REGS_SEGS_STATE
 #define THREAD_STATE_SIZE		i386_THREAD_STATE_COUNT