diff --git a/modules/siddhi-core/src/main/java/io/siddhi/core/query/selector/attribute/aggregator/CountAttributeAggregatorExecutor.java b/modules/siddhi-core/src/main/java/io/siddhi/core/query/selector/attribute/aggregator/CountAttributeAggregatorExecutor.java
index f26d888b3a..3b209dcd36 100644
--- a/modules/siddhi-core/src/main/java/io/siddhi/core/query/selector/attribute/aggregator/CountAttributeAggregatorExecutor.java
+++ b/modules/siddhi-core/src/main/java/io/siddhi/core/query/selector/attribute/aggregator/CountAttributeAggregatorExecutor.java
@@ -19,6 +19,7 @@
 
 import io.siddhi.annotation.Example;
 import io.siddhi.annotation.Extension;
+import io.siddhi.annotation.Parameter;
 import io.siddhi.annotation.ParameterOverload;
 import io.siddhi.annotation.ReturnAttribute;
 import io.siddhi.annotation.util.DataType;
@@ -40,9 +41,18 @@
         name = "count",
         namespace = "",
         description = "Returns the count of all the events.",
-        parameters = {},
+        parameters = {
+                @Parameter(name = "arg",
+                        description = "This function accepts one parameter. " +
+                                "It can belong to any one of the available types.",
+                        type = {DataType.INT, DataType.LONG, DataType.DOUBLE, DataType.FLOAT,
+                                DataType.STRING, DataType.BOOL, DataType.OBJECT},
+                        dynamic = true,
+                        optional = true)
+        },
         parameterOverloads = {
-                @ParameterOverload()
+                @ParameterOverload(),
+                @ParameterOverload(parameterNames = {"arg"})
         },
         returnAttributes = @ReturnAttribute(
                 description = "Returns the event count as a long.",