diff --git a/types/aphrodite/index.d.ts b/types/aphrodite/index.d.ts
index 3e7807b6b6..3b96f46c21 100644
--- a/types/aphrodite/index.d.ts
+++ b/types/aphrodite/index.d.ts
@@ -21,7 +21,7 @@ type CSSProperties = Omit<BaseCSSProperties, 'fontFamily' | 'transition' | 'anim
 
 // For pseudo selectors and media queries
 interface OpenCSSProperties extends CSSProperties {
-    [k: string]: CSSProperties[keyof CSSProperties] | CSSProperties;
+    [k: string]: CSSProperties[NonNullable<keyof CSSProperties>] | CSSProperties;
 }
 
 /**