diff --git a/mathgenerator/funcs/decimal_to_roman_numerals.py b/mathgenerator/funcs/decimal_to_roman_numerals.py
index 46a1ebd..63b64f2 100644
--- a/mathgenerator/funcs/decimal_to_roman_numerals.py
+++ b/mathgenerator/funcs/decimal_to_roman_numerals.py
@@ -15,7 +15,7 @@ def decimalToRomanNumeralsFunc(maxDecimal=4000):
         if last_value <= 3:
             solution += (roman_dict[divisor] * last_value)
         elif last_value == 4:
-            solution += (roman_dict[divisor] * roman_dict[divisor * 5])
+            solution += (roman_dict[divisor] + roman_dict[divisor * 5])
         elif 5 <= last_value <= 8:
             solution += (roman_dict[divisor * 5] + (roman_dict[divisor] * (last_value - 5)))
         elif last_value == 9: