diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4763a83910..18d0ce83b8 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2019-05-04  Tom Tromey  <tom@tromey.com>
+
+	* arm-linux-nat.c (arm_linux_nat_target::can_use_hw_breakpoint):
+	Use gdb_assert_not_reached.
+
 2019-05-04  Tom Tromey  <tom@tromey.com>
 
 	* compile/compile-cplus-types.c (compile_cplus_convert_enum): Use
diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c
index 52668da9fc..c86c97d895 100644
--- a/gdb/arm-linux-nat.c
+++ b/gdb/arm-linux-nat.c
@@ -690,7 +690,7 @@ arm_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
 	return -1;
     }
   else
-    gdb_assert (FALSE);
+    gdb_assert_not_reached ("unknown breakpoint type");
 
   return 1;
 }