diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 390955df943..61ff995418a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2001-08-18  Zack Weinberg  <zackw@panix.com>
+
+	* unwind-dw2.c (execute_stack_op): Add default aborts to
+	the inner switches to prevent warnings.
+
 2001-08-18  Richard Henderson  <rth@redhat.com>
 
 	* timevar.h (struct timevar_time_def): Change element type to float.
diff --git a/gcc/unwind-dw2.c b/gcc/unwind-dw2.c
index 16f6bceb5c9..c56116b62c4 100644
--- a/gcc/unwind-dw2.c
+++ b/gcc/unwind-dw2.c
@@ -563,6 +563,9 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	      op_ptr = read_uleb128 (op_ptr, &ptrtmp); reg = ptrtmp;
 	      result += reg;
 	      break;
+
+	    default:
+	      abort ();
 	    }
 	  break;
 
@@ -640,6 +643,9 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	    case DW_OP_ne:
 	      result = (_Unwind_Sword)first != (_Unwind_Sword)second;
 	      break;
+
+	    default:
+	      abort ();
 	    }
 	  }
 	  break;