diff --git a/sip/siplib/sip.h b/sip/siplib/sip.h
index 75cc20d9..04d1463b 100644
--- a/sip/siplib/sip.h
+++ b/sip/siplib/sip.h
@@ -55,7 +55,7 @@ extern "C" {
  * Define the SIP version number.
  */
 #define SIP_VERSION         0x040c00
-#define SIP_VERSION_STR     "4.12-snapshot-eac351f5cca7"
+#define SIP_VERSION_STR     "4.12-snapshot-24f170d5c2dd"
 
 
 /*
@@ -298,6 +298,13 @@ typedef int sip_gilstate_t;
  * Some convenient function pointers.
  */
 
+ 
+/*
+ * forward declare these structures
+ */    
+struct _sipSimpleWrapper;
+struct _sipTypeDef;    
+
 /*
  * The operation an access function is being asked to perform.
  */
diff --git a/sip/siplib/siplib.c b/sip/siplib/siplib.c
index ce2da003..e0a0e9af 100644
--- a/sip/siplib/siplib.c
+++ b/sip/siplib/siplib.c
@@ -6016,8 +6016,8 @@ static int add_lazy_container_attrs(sipTypeDef *td, sipContainerDef *cod,
 
             vd->vd_type = (vd_8->vd_is_static ? ClassVariable : InstanceVariable);
             vd->vd_name = vd_8->vd_name;
-            vd->vd_getter = (PyCFunction)vd_8->vd_getter;
-            vd->vd_setter = (PyCFunction)vd_8->vd_setter;
+            vd->vd_getter = (PyMethodDef *)vd_8->vd_getter;
+            vd->vd_setter = (PyMethodDef *)vd_8->vd_setter;
             vd->vd_deleter = NULL;
             vd->vd_docstring = NULL;