diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 2349c96dfc..2aa42cd75a 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-28  Gary Benson <gbenson@redhat.com>
+
+	* gdb.base/sigaltstack.c (catcher): Add default case to switch
+	statement.
+
 2020-05-28  Gary Benson <gbenson@redhat.com>
 
 	* gdb.cp/classes.exp (prepare_for_testing): Add
diff --git a/gdb/testsuite/gdb.base/sigaltstack.c b/gdb/testsuite/gdb.base/sigaltstack.c
index e52b4366aa..9dec8a1d2f 100644
--- a/gdb/testsuite/gdb.base/sigaltstack.c
+++ b/gdb/testsuite/gdb.base/sigaltstack.c
@@ -68,6 +68,8 @@ catcher (int signal)
     case INNER:
       level = LEAF;
       return;
+    default:
+      abort ();
     }
 }