diff --git a/lib/fast486/opcodes.c b/lib/fast486/opcodes.c
index a3e16644001..67432a88e8b 100644
--- a/lib/fast486/opcodes.c
+++ b/lib/fast486/opcodes.c
@@ -5890,12 +5890,12 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeLods)
         if (OperandSize)
         {
             State->GeneralRegs[FAST486_REG_ECX].Long = 0;
-            State->GeneralRegs[FAST486_REG_ESI].Long += Count - 1;
+            State->GeneralRegs[FAST486_REG_ESI].Long += (Count - 1) * DataSize;
         }
         else
         {
             State->GeneralRegs[FAST486_REG_ECX].LowWord = 0;
-            State->GeneralRegs[FAST486_REG_ESI].LowWord += Count - 1;
+            State->GeneralRegs[FAST486_REG_ESI].LowWord += (Count - 1) * DataSize;
         }
     }