diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index a89267fc27..84964dc00a 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2020-03-17  Kamil Rytarowski  <n54@gmx.com>
+
+	* regformats/regdef.h: Put reg in gdb namespace.
+
 2020-03-17  Kamil Rytarowski  <n54@gmx.com>
 
 	* i386-bsd-nat.c (gdb_ptrace): New.
diff --git a/gdb/regformats/regdef.h b/gdb/regformats/regdef.h
index 340281e242..ed9aeb7af4 100644
--- a/gdb/regformats/regdef.h
+++ b/gdb/regformats/regdef.h
@@ -19,6 +19,8 @@
 #ifndef REGFORMATS_REGDEF_H
 #define REGFORMATS_REGDEF_H
 
+namespace gdb {
+
 struct reg
 {
   reg (int _offset)
@@ -60,4 +62,6 @@ struct reg
   }
 };
 
+} /* namespace gdb */
+
 #endif /* REGFORMATS_REGDEF_H */
diff --git a/gdbserver/ChangeLog b/gdbserver/ChangeLog
index 5c3761a671..ea8a079fbf 100644
--- a/gdbserver/ChangeLog
+++ b/gdbserver/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-17  Kamil Rytarowski  <n54@gmx.com>
+
+	* regcache.cc (find_register_by_number): Update.
+	* tdesc.cc (init_target_desc): Likewise.
+	* tdesc.h (target_desc::reg_defs): Likewise.
+
 2020-03-12  Tom Tromey  <tom@tromey.com>
 
 	* configure: Rebuild.
diff --git a/gdbserver/regcache.cc b/gdbserver/regcache.cc
index 33d38879dc..6c0af95b34 100644
--- a/gdbserver/regcache.cc
+++ b/gdbserver/regcache.cc
@@ -198,7 +198,7 @@ regcache_cpy (struct regcache *dst, struct regcache *src)
 
 /* Return a reference to the description of register N.  */
 
-static const struct reg &
+static const struct gdb::reg &
 find_register_by_number (const struct target_desc *tdesc, int n)
 {
   return tdesc->reg_defs[n];
diff --git a/gdbserver/tdesc.cc b/gdbserver/tdesc.cc
index de25e7cfb4..8d97defb9b 100644
--- a/gdbserver/tdesc.cc
+++ b/gdbserver/tdesc.cc
@@ -75,7 +75,7 @@ init_target_desc (struct target_desc *tdesc,
 	gdb_assert (regnum == 0 || regnum >= tdesc->reg_defs.size ());
 
 	if (regnum != 0)
-	  tdesc->reg_defs.resize (regnum, reg (offset));
+	  tdesc->reg_defs.resize (regnum, gdb::reg (offset));
 
 	tdesc->reg_defs.emplace_back (treg->name.c_str (), offset,
 				      treg->bitsize);
diff --git a/gdbserver/tdesc.h b/gdbserver/tdesc.h
index 5e0df85cea..f9ca478ff6 100644
--- a/gdbserver/tdesc.h
+++ b/gdbserver/tdesc.h
@@ -31,7 +31,7 @@ struct target_desc : tdesc_element
 {
   /* A vector of elements of register definitions that
      describe the inferior's register set.  */
-  std::vector<struct reg> reg_defs;
+  std::vector<struct gdb::reg> reg_defs;
 
   /* The register cache size, in bytes.  */
   int registers_size;