diff --git a/headers/libs/agg/dbg_new/agg_dbg_new.h b/headers/libs/agg/dbg_new/agg_dbg_new.h
index 687358d851..b9d16a15d7 100644
--- a/headers/libs/agg/dbg_new/agg_dbg_new.h
+++ b/headers/libs/agg/dbg_new/agg_dbg_new.h
@@ -26,8 +26,8 @@
 
 //#define AGG_DBG_NEW_CHECK_ADDR
 
-void* operator new (unsigned size, const char* file, int line);
-void* operator new [] (unsigned size, const char* file, int line);
+void* operator new (size_t size, const char* file, int line);
+void* operator new [] (size_t size, const char* file, int line);
 #define AGG_DBG_NEW_OPERATOR new(__FILE__, __LINE__)
 
 void  operator delete(void *ptr) throw();
diff --git a/src/libs/agg/src/dbg_new/agg_dbg_new.cpp b/src/libs/agg/src/dbg_new/agg_dbg_new.cpp
index 92d8de593b..2e777928b5 100644
--- a/src/libs/agg/src/dbg_new/agg_dbg_new.cpp
+++ b/src/libs/agg/src/dbg_new/agg_dbg_new.cpp
@@ -479,13 +479,13 @@ namespace agg
 #endif
 
 //----------------------------------------------------------------------------
-void* operator new (unsigned size, const char* file, int line)
+void* operator new (size_t size, const char* file, int line)
 {
     return agg::dbg_malloc(size, file, line);
 }
 
 //----------------------------------------------------------------------------
-void* operator new [] (unsigned size, const char* file, int line)
+void* operator new [] (size_t size, const char* file, int line)
 {
     return agg::dbg_malloc(size, file, line);
 }