--- a/editors/awk.c
+++ b/editors/awk.c
@@ -2041,27 +2041,27 @@ static var *exec_builtin(node *op, var *
 		break;
 
 	case B_an:
-		setvar_i(res, (long)getvar_i(av[0]) & (long)getvar_i(av[1]));
+		setvar_i(res, (unsigned long)getvar_i(av[0]) & (unsigned long)getvar_i(av[1]));
 		break;
 
 	case B_co:
-		setvar_i(res, ~(long)getvar_i(av[0]));
+		setvar_i(res, ~(unsigned long)getvar_i(av[0]));
 		break;
 
 	case B_ls:
-		setvar_i(res, (long)getvar_i(av[0]) << (long)getvar_i(av[1]));
+		setvar_i(res, (unsigned long)getvar_i(av[0]) << (unsigned long)getvar_i(av[1]));
 		break;
 
 	case B_or:
-		setvar_i(res, (long)getvar_i(av[0]) | (long)getvar_i(av[1]));
+		setvar_i(res, (unsigned long)getvar_i(av[0]) | (unsigned long)getvar_i(av[1]));
 		break;
 
 	case B_rs:
-		setvar_i(res, (long)((unsigned long)getvar_i(av[0]) >> (unsigned long)getvar_i(av[1])));
+		setvar_i(res, (unsigned long)getvar_i(av[0]) >> (unsigned long)getvar_i(av[1]));
 		break;
 
 	case B_xo:
-		setvar_i(res, (long)getvar_i(av[0]) ^ (long)getvar_i(av[1]));
+		setvar_i(res, (unsigned long)getvar_i(av[0]) ^ (unsigned long)getvar_i(av[1]));
 		break;
 
 	case B_lo:
