1 files changed, 6 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/IoLib.h b/MdePkg/Include/Library/IoLib.h
index 289c10ff54..e484bef9ec 100644
--- a/MdePkg/Include/Library/IoLib.h
+++ b/MdePkg/Include/Library/IoLib.h
@@ -1237,6 +1237,8 @@ MmioRead8 (
 
   @param  Address The MMIO register to write.
   @param  Value   The value to write to the MMIO register.
+  
+  @return Value.
 
 **/
 UINT8
@@ -1525,6 +1527,8 @@ MmioRead16 (
 
   @param  Address The MMIO register to write.
   @param  Value   The value to write to the MMIO register.
+  
+  @return Value.
 
 **/
 UINT16
@@ -1820,6 +1824,8 @@ MmioRead32 (
 
   @param  Address The MMIO register to write.
   @param  Value   The value to write to the MMIO register.
+  
+  @return Value.
 
 **/
 UINT32