diff --git a/src/southbridge/intel/lynxpoint/acpi/serialio.asl b/src/southbridge/intel/lynxpoint/acpi/serialio.asl
index 59228d6cf5..78eb4ee697 100644
--- a/src/southbridge/intel/lynxpoint/acpi/serialio.asl
+++ b/src/southbridge/intel/lynxpoint/acpi/serialio.asl
@@ -542,7 +542,7 @@ Device (GPIO)
 			0x00000000,  // AddressMinimum
 			0x00000000,  // AddressMaximum
 			0x00000000,  // AddressTranslation
-			0x00000000,  // RangeLength
+			0x00000001,  // RangeLength
 			,            // ResourceSourceIndex
 			,            // ResourceSource
 			BAR0)