diff --git a/aws_xray_sdk/core/context.py b/aws_xray_sdk/core/context.py
index 63e994de..553c85a2 100644
--- a/aws_xray_sdk/core/context.py
+++ b/aws_xray_sdk/core/context.py
@@ -44,7 +44,7 @@ def end_segment(self, end_time=None):
         """
         End the current active segment.
 
-        :param int end_time: epoch in seconds. If not specified the current
+        :param float end_time: epoch in seconds. If not specified the current
             system time will be used.
         """
         entity = self.get_trace_entity()
@@ -75,7 +75,7 @@ def end_subsegment(self, end_time=None):
         End the current active segment. Return False if there is no
         subsegment to end.
 
-        :param int end_time: epoch in seconds. If not specified the current
+        :param float end_time: epoch in seconds. If not specified the current
             system time will be used.
         """
         subsegment = self.get_trace_entity()
diff --git a/aws_xray_sdk/core/models/entity.py b/aws_xray_sdk/core/models/entity.py
index a2150a5e..9a5d08e7 100644
--- a/aws_xray_sdk/core/models/entity.py
+++ b/aws_xray_sdk/core/models/entity.py
@@ -64,7 +64,7 @@ def close(self, end_time=None):
         Close the trace entity by setting `end_time`
         and flip the in progress flag to False.
 
-        :param int end_time: Epoch in seconds. If not specified
+        :param float end_time: Epoch in seconds. If not specified
             current time will be used.
         """
         self._check_ended()
diff --git a/aws_xray_sdk/core/models/subsegment.py b/aws_xray_sdk/core/models/subsegment.py
index 3c4289e9..53f944de 100644
--- a/aws_xray_sdk/core/models/subsegment.py
+++ b/aws_xray_sdk/core/models/subsegment.py
@@ -133,7 +133,7 @@ def close(self, end_time=None):
         and flip the in progress flag to False. Also decrement
         parent segment's ref counter by 1.
 
-        :param int end_time: Epoch in seconds. If not specified
+        :param float end_time: Epoch in seconds. If not specified
             current time will be used.
         """
         super().close(end_time)