diff --git a/VC++Files/libmysqld/libmysqld.dsp b/VC++Files/libmysqld/libmysqld.dsp
index 019589289cd..bb31a8ada43 100644
--- a/VC++Files/libmysqld/libmysqld.dsp
+++ b/VC++Files/libmysqld/libmysqld.dsp
@@ -344,6 +344,10 @@ SOURCE=..\mysys\my_alloc.c
 # End Source File
 # Begin Source File
 
+SOURCE=..\mysys\my_decimal.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=..\mysys\my_getopt.c
 # End Source File
 # Begin Source File
diff --git a/VC++Files/sql/mysqld.dsp b/VC++Files/sql/mysqld.dsp
index e63d80d8697..5ca468f7fc9 100644
--- a/VC++Files/sql/mysqld.dsp
+++ b/VC++Files/sql/mysqld.dsp
@@ -1085,6 +1085,10 @@ SOURCE=.\mf_iocache.cpp
 # End Source File
 # Begin Source File
 
+SOURCE=.\my_decimal.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=.\my_time.c
 # End Source File
 # Begin Source File
diff --git a/VC++Files/strings/strings.dsp b/VC++Files/strings/strings.dsp
index c8f3208e822..340617344f2 100644
--- a/VC++Files/strings/strings.dsp
+++ b/VC++Files/strings/strings.dsp
@@ -177,6 +177,10 @@ SOURCE=.\ctype.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\decimal.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\int2str.c
 # End Source File
 # Begin Source File
diff --git a/sql/field.cc b/sql/field.cc
index 0be72458701..1da9bf6f7b0 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -1581,10 +1581,10 @@ bool Field_new_decimal::store_value(const my_decimal *decimal_value)
     DBUG_PRINT("info", ("overflow"));
     set_value_on_overflow(&buff, dec->sign());
     my_decimal2binary(E_DEC_FATAL_ERROR, &buff, ptr, field_length, decimals());
-    DBUG_EXECUTE("info", print_decimal_buff(&buff, ptr, bin_size););
+    DBUG_EXECUTE("info", print_decimal_buff(&buff, (byte *) ptr, bin_size););
     DBUG_RETURN(1);
   }
-  DBUG_EXECUTE("info", print_decimal_buff(dec, ptr, bin_size););
+  DBUG_EXECUTE("info", print_decimal_buff(dec, (byte *) ptr, bin_size););
   DBUG_RETURN(error);
 }
 
@@ -1708,7 +1708,7 @@ my_decimal* Field_new_decimal::val_decimal(my_decimal *decimal_value)
   binary2my_decimal(E_DEC_FATAL_ERROR, ptr, decimal_value,
                     field_length,
                     decimals());
-  DBUG_EXECUTE("info", print_decimal_buff(decimal_value, ptr, bin_size););
+  DBUG_EXECUTE("info", print_decimal_buff(decimal_value, (byte *) ptr, bin_size););
   DBUG_RETURN(decimal_value);
 }
 
diff --git a/sql/item.h b/sql/item.h
index 3e1844ec76e..2029337d5c4 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -453,7 +453,11 @@ public:
   longlong val_int();
   String *val_str(String *sp);
   my_decimal *val_decimal(my_decimal *);
+#ifdef __WIN__
+  bool is_null();
+#else
   inline bool is_null();
+#endif
   void print(String *str);
 
   inline void make_field(Send_field *field)
diff --git a/sql/item_func.cc b/sql/item_func.cc
index 1e61474f412..1c03643a915 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -1732,7 +1732,7 @@ longlong Item_func_round::int_op()
   if (truncate)
   {
     if (unsigned_flag)
-      tmp2= floor(((double)((ulonglong)value))/tmp)*tmp;
+      tmp2= floor(ulonglong2double(value)/tmp)*tmp;
     else if (value >= 0)
       tmp2= floor(((double)value)/tmp)*tmp;
     else
diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 2ecc1eb083c..3cfa1e4e37f 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -578,7 +578,7 @@ bool Item_sum_sum_distinct::add()
     {
       DBUG_ASSERT(tree);
       null_value= 0;
-      my_decimal2binary(E_DEC_FATAL_ERROR, val, dec_bin_buff,
+      my_decimal2binary(E_DEC_FATAL_ERROR, val, (char *) dec_bin_buff,
                         args[0]->max_length, args[0]->decimals);
       DBUG_RETURN(tree->unique_add(dec_bin_buff));
     }
@@ -613,7 +613,7 @@ void Item_sum_sum_distinct::add_real(double val)
 
 void Item_sum_sum_distinct::add_decimal(byte *val)
 {
-  binary2my_decimal(E_DEC_FATAL_ERROR, val, &tmp_dec,
+  binary2my_decimal(E_DEC_FATAL_ERROR, (char *) val, &tmp_dec,
                     args[0]->max_length, args[0]->decimals);
   my_decimal_add(E_DEC_FATAL_ERROR, dec_buffs + (curr_dec_buff^1),
                  &tmp_dec, dec_buffs + curr_dec_buff);
diff --git a/sql/sp_head.cc b/sql/sp_head.cc
index 075aef9d286..2ddd40bd22c 100644
--- a/sql/sp_head.cc
+++ b/sql/sp_head.cc
@@ -2018,7 +2018,7 @@ sp_merge_table_hash(HASH *hdst, HASH *hsrc)
     SP_TABLE *tabsrc= (SP_TABLE *)hash_element(hsrc, i);
 
     if (! (tabdst= (SP_TABLE *)hash_search(hdst,
-					   tabsrc->qname.str,
+					   (byte *) tabsrc->qname.str,
 					   tabsrc->qname.length)))
     {
       my_hash_insert(hdst, (byte *)tabsrc);
diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc
index b2f7922f1db..1f85d081d55 100644
--- a/sql/sql_cache.cc
+++ b/sql/sql_cache.cc
@@ -1102,7 +1102,7 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
                    ("Handler require invalidation queries of %s.%s %lld-%lld",
                               table_list.db, table_list.alias,
                               engine_data, table->engine_data()));
-        invalidate_table(table->db(), table->key_length());
+        invalidate_table((byte *) table->db(), table->key_length());
       }
       else
         thd->lex->safe_to_cache_query= 0;       // Don't try to cache this