diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 57def0c5c..ba9589bb5 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,9 @@
+2011-04-21  Chris Sutcliffe  <ir0nh34d@users.sf.net>
+
+	* include/imagehlp.h (PREAD_PROCESS_MEMORY_ROUTINE): Correct definition.
+
+	Thanks to Safety0ff for the report.
+
 2011-04-04  Corinna Vinschen  <corinna@vinschen.de>
 
 	* include/winnt.h (DOMAIN_ALIAS_RID_REMOTE_DESKTOP_USERS): Add.
diff --git a/winsup/w32api/include/imagehlp.h b/winsup/w32api/include/imagehlp.h
index 448c51d96..01ffdba56 100644
--- a/winsup/w32api/include/imagehlp.h
+++ b/winsup/w32api/include/imagehlp.h
@@ -174,7 +174,7 @@ typedef struct _tagSTACKFRAME {
 	DWORD Reserved[3];
 	KDHELP KdHelp;
 } STACKFRAME,*LPSTACKFRAME;
-typedef BOOL(STDCALL*PREAD_PROCESS_MEMORY_ROUTINE)(HANDLE ,LPCVOID,LPVOID,DWORD,LPDWORD); 
+typedef BOOL(STDCALL*PREAD_PROCESS_MEMORY_ROUTINE)(HANDLE,DWORD,PVOID,DWORD,PDWORD); 
 typedef LPVOID(STDCALL*PFUNCTION_TABLE_ACCESS_ROUTINE)(HANDLE,DWORD); 
 typedef DWORD(STDCALL*PGET_MODULE_BASE_ROUTINE)(HANDLE,DWORD); 
 typedef DWORD(STDCALL*PTRANSLATE_ADDRESS_ROUTINE)(HANDLE,HANDLE,LPADDRESS);