diff --git a/types/ramda/index.d.ts b/types/ramda/index.d.ts
index 205df9f569..081a62cbd7 100644
--- a/types/ramda/index.d.ts
+++ b/types/ramda/index.d.ts
@@ -576,10 +576,9 @@ declare namespace R {
          * Takes a function and two values in its domain and returns true if the values map to the same value in the
          * codomain; false otherwise.
          */
-        eqBy<T>(fn: (a: T) => T, a: T, b: T): boolean;
-        eqBy<T>(fn: (a: T) => T, a: T): (b: T) => boolean;
-        eqBy<T>(fn: (a: T) => T): (a: T, b: T) => boolean;
-        eqBy<T>(fn: (a: T) => T): (a: T) => (b: T) => boolean;
+        eqBy<T, U = T>(fn: (a: T) => U, a: T, b: T): boolean;
+        eqBy<T, U = T>(fn: (a: T) => U, a: T): (b: T) => boolean;
+        eqBy<T, U = T>(fn: (a: T) => U): CurriedFunction2<T, T, boolean>;
 
         /**
          * Reports whether two functions have the same value for the specified property.
diff --git a/types/ramda/ramda-tests.ts b/types/ramda/ramda-tests.ts
index 8aef1c65fc..c32ab72028 100644
--- a/types/ramda/ramda-tests.ts
+++ b/types/ramda/ramda-tests.ts
@@ -2136,6 +2136,14 @@ class Rectangle {
     const c: (a: any[]) => any[] = R.symmetricDifferenceWith(eqA)(l1); // => [{a: 1}, {a: 2}, {a: 5}, {a: 6}]
 };
 
+() => {
+    const eqL = R.eqBy<string, number>(s => s.length);
+    const l1 = ['bb', 'ccc', 'dddd'];
+    const l2 = ['aaa', 'bb', 'c'];
+    R.symmetricDifferenceWith(eqL, l1, l2); // => ['dddd', 'c']
+    R.symmetricDifferenceWith(eqL)(l1, l2); // => ['dddd', 'c']
+};
+
 /*****************************************************************
  * String category
  */