diff --git a/Lib/fontTools/ttLib/tables/_l_o_c_a.py b/Lib/fontTools/ttLib/tables/_l_o_c_a.py
index f13debb1c..c676e3bd1 100644
--- a/Lib/fontTools/ttLib/tables/_l_o_c_a.py
+++ b/Lib/fontTools/ttLib/tables/_l_o_c_a.py
@@ -12,7 +12,7 @@ class table__l_o_c_a(DefaultTable.DefaultTable):
 	def decompile(self, data, ttFont):
 		longFormat = ttFont['head'].indexToLocFormat
 		if longFormat:
-			format = "i"
+			format = "I"
 		else:
 			format = "H"
 		locations = array.array(format)