diff --git a/oatmeal-cookies.md b/oatmeal-cookies.md
index 69cb010..124c441 100644
--- a/oatmeal-cookies.md
+++ b/oatmeal-cookies.md
@@ -17,7 +17,7 @@ Makes: 24
 - 1/2 teaspoon vanilla
 
 ### Method
-Preheat oven to 375°F. Grease baking sheets.
+Preheat oven to 375°F/190°C. Grease baking sheets.
 
 Stir together oats, flour, cinnamon, baking soda, and salt. Beat together butter, brown sugar, and granulated sugar in a large bowl with an electric mixer until light and fluffy. Add egg and vanilla and beat until combined well. Add oat mixture and beat until just combined.