diff --git a/ChangeLog b/ChangeLog
index 9858dceff..3f0469400 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-02-25 Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/ObjectiveC2/runtime.c:
+	* Source/ObjectiveC2/blocks_runtime.m:
+	Avoid compiler warnings.
+
 2010-02-25 Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Source/NSAssertionHandler.m:
diff --git a/Source/ObjectiveC2/blocks_runtime.m b/Source/ObjectiveC2/blocks_runtime.m
index 817d2dbff..25e0151da 100644
--- a/Source/ObjectiveC2/blocks_runtime.m
+++ b/Source/ObjectiveC2/blocks_runtime.m
@@ -26,6 +26,7 @@
 #import "blocks_runtime.h"
 #import "runtime.h"
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <limits.h>
 
diff --git a/Source/ObjectiveC2/runtime.c b/Source/ObjectiveC2/runtime.c
index 5160cf60e..38c8fdb8b 100644
--- a/Source/ObjectiveC2/runtime.c
+++ b/Source/ObjectiveC2/runtime.c
@@ -68,7 +68,7 @@ void __objc_update_dispatch_table_for_class(Class);
  * Private runtime function for determining whether a class responds to a
  * selector.
  */
-BOOL __objc_responds_to(Class, SEL);
+BOOL __objc_responds_to(id, SEL);
 /**
  *  Runtime library constant for uninitialized dispatch table.
  */