diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.c b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.c
index be49ba4042..edc03f0e6b 100644
--- a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.c
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.c
@@ -153,7 +153,7 @@ IsDevicePathEndType (
   )
 {
   ASSERT (Node != NULL);
-  return ((DevicePathType (Node) & 0x7f) == END_DEVICE_PATH_TYPE);
+  return (BOOLEAN) ((DevicePathType (Node) & 0x7f) == END_DEVICE_PATH_TYPE);
 }
 
 /**
@@ -176,7 +176,7 @@ IsDevicePathEnd (
   )
 {
   ASSERT (Node != NULL);
-  return (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE);
+  return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE);
 }
 
 /**
@@ -199,7 +199,7 @@ IsDevicePathEndInstance (
   )
 {
   ASSERT (Node != NULL);
-  return (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE);
+  return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE);
 }
 
 /**