diff --git a/src/Functions/array/arrayFold.cpp b/src/Functions/array/arrayFold.cpp
index 7ae764104de..51a1fb50322 100644
--- a/src/Functions/array/arrayFold.cpp
+++ b/src/Functions/array/arrayFold.cpp
@@ -219,7 +219,12 @@ private:
 
 REGISTER_FUNCTION(ArrayFold)
 {
-    factory.registerFunction<ArrayFold>();
+    
+    factory.registerFunction<ArrayFold>(R"(
+        Function arrayFold(x1,...,xn,accum -> expression, array1,...,arrayn, init_accum) applies lambda function to a number of same sized array columns 
+        and collects result in accumulator. Accumulator can be either constant or column.
+        )");
+    
 }