2 files changed, 13 insertions, 13 deletions
diff --git a/compile-i386.c b/compile-i386.c
index f8e2e61a..70253b70 100644
--- a/compile-i386.c
+++ b/compile-i386.c
@@ -1759,7 +1759,7 @@ static void emit_loop(struct statement *stmt)
 static struct storage *x86_statement(struct statement *stmt)
 {
 	if (!stmt)
-		return 0;
+		return NULL;
 	switch (stmt->type) {
 	case STMT_RETURN:
 		return emit_return_stmt(stmt);
@@ -2090,14 +2090,14 @@ static void x86_initializer_expr(struct expression *expr, struct symbol *ctype)
 static struct storage *x86_expression(struct expression *expr)
 {
 	if (!expr)
-		return 0;
+		return NULL;
 
 	if (!expr->ctype) {
 		struct position *pos = &expr->pos;
 		printf("\tno type at %s:%d:%d\n",
 			input_streams[pos->stream].name,
 			pos->line, pos->pos);
-		return 0;
+		return NULL;
 	}
 
 	switch (expr->type) {
@@ -2122,7 +2122,7 @@ static struct storage *x86_expression(struct expression *expr)
 	case EXPR_DEREF:
 	case EXPR_SIZEOF:
 		warn(expr->pos, "invalid expression after evaluation");
-		return 0;
+		return NULL;
 	case EXPR_CAST:
 		return emit_cast_expr(expr);
 	case EXPR_VALUE:
@@ -2145,16 +2145,16 @@ static struct storage *x86_expression(struct expression *expr)
 	// valid as sub-expressions of initializers.
 	case EXPR_POS:
 		warn(expr->pos, "unable to show plain initializer position expression");
-		return 0;
+		return NULL;
 	case EXPR_IDENTIFIER:
 		warn(expr->pos, "unable to show identifier expression");
-		return 0;
+		return NULL;
 	case EXPR_INDEX:
 		warn(expr->pos, "unable to show index expression");
-		return 0;
+		return NULL;
 	case EXPR_TYPE:
 		warn(expr->pos, "unable to show type expression");
-		return 0;
+		return NULL;
 	}
-	return 0;
+	return NULL;
 }
diff --git a/evaluate.c b/evaluate.c
index 0dd72ee8..5a06fea5 100644
--- a/evaluate.c
+++ b/evaluate.c
@@ -789,7 +789,7 @@ static struct symbol *evaluate_assignment(struct expression *expr)
 	if (expr->op != '=') {
 		rtype = evaluate_binop_assignment(expr, left, right);
 		if (!rtype)
-			return 0;
+			return NULL;
 		right = expr->right;
 	}
 
@@ -801,7 +801,7 @@ static struct symbol *evaluate_assignment(struct expression *expr)
 	rtype = degenerate(right);
 
 	if (!compatible_assignment_types(expr, ltype, &expr->right, rtype, "assignment"))
-		return 0;
+		return NULL;
 
 	if (ltype->type == SYM_NODE)
 		ltype->ctype.modifiers |= MOD_ASSIGNED;
@@ -1165,12 +1165,12 @@ static struct symbol *evaluate_sizeof(struct expression *expr)
 		size = expr->cast_type->bit_size;
 	} else {
 		if (!evaluate_expression(expr->cast_expression))
-			return 0;
+			return NULL;
 		size = expr->cast_expression->ctype->bit_size;
 	}
 	if (size & 7) {
 		warn(expr->pos, "cannot size expression");
-		return 0;
+		return NULL;
 	}
 	expr->type = EXPR_VALUE;
 	expr->value = size >> 3;