diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 46c296992b5..4c2fc5dda65 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,7 @@
+2016-09-16  Marek Polacek  <polacek@redhat.com>
+
+	* c-typeck.c (lvalue_p): Use true and false instead of 1 and 0.
+
 2016-09-14  Marek Polacek  <polacek@redhat.com>
 
 	* c-array-notation.c (create_cmp_incr): Use false instead of 0.
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index 4dec397225e..059ad1fc2e0 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -4631,7 +4631,7 @@ lvalue_p (const_tree ref)
 
     case COMPOUND_LITERAL_EXPR:
     case STRING_CST:
-      return 1;
+      return true;
 
     case INDIRECT_REF:
     case ARRAY_REF:
@@ -4647,7 +4647,7 @@ lvalue_p (const_tree ref)
       return TREE_CODE (TREE_TYPE (ref)) == ARRAY_TYPE;
 
     default:
-      return 0;
+      return false;
     }
 }