Index: GSObjCRuntime.m
===================================================================
--- GSObjCRuntime.m	(revision 37628)
+++ GSObjCRuntime.m	(working copy)
@@ -1090,6 +1090,25 @@
 	    }
 	    break;
 
+	  case _C_BOOL:
+	    {
+	      bool	v;
+
+	      if (sel == 0)
+		{
+		  v = *(bool *)((char *)self + offset);
+		}
+	      else
+		{
+		  bool	(*imp)(id, SEL) =
+		    (bool (*)(id, SEL))[self methodForSelector: sel];
+
+		  v = (*imp)(self, sel);
+		}
+	      val = [NSNumber numberWithBool: v];
+	    }
+	    break;
+
 	  case _C_SHT:
 	    {
 	      short	v;
@@ -1534,6 +1553,26 @@
 	    }
 	    break;
 
+	  case _C_BOOL:
+	    {
+	      bool	v = [val boolValue];
+
+	      if (sel == 0)
+		{
+		  bool *ptr = (bool*)((char *)self + offset);
+
+		  *ptr = v;
+		}
+	      else
+		{
+		  void	(*imp)(id, SEL, bool) =
+		    (void (*)(id, SEL, bool))[self methodForSelector: sel];
+
+		  (*imp)(self, sel, v);
+		}
+	    }
+	    break;
+
 	  case _C_SHT:
 	    {
 	      short	v = [val shortValue];