diff -Nrup a/src/flex.skl b/src/flex.skl
--- a/src/flex.skl	2016-07-27 11:11:48.528378027 -0400
+++ b/src/flex.skl	2016-07-27 11:14:03.012351701 -0400
@@ -1718,7 +1718,7 @@ int yyFlexLexer::yy_get_next_buffer()
 
 	else
 		{
-			yy_size_t num_to_read =
+			int num_to_read =
 			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
 
 		while ( num_to_read <= 0 )
diff -Nrup a/src/scan.c b/src/scan.c
--- a/src/scan.c	2015-11-17 11:17:41.000000000 -0500
+++ b/src/scan.c	2016-07-27 11:14:18.126674417 -0400
@@ -4181,7 +4181,7 @@ static int yy_get_next_buffer (void)
 
 	else
 		{
-			yy_size_t num_to_read =
+			int num_to_read =
 			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
 
 		while ( num_to_read <= 0 )
diff -Nrup a/src/skel.c b/src/skel.c
--- a/src/skel.c	2015-11-17 11:17:39.000000000 -0500
+++ b/src/skel.c	2016-07-27 11:14:36.362857240 -0400
@@ -1929,7 +1929,7 @@ const char *skel[] = {
   "",
   "	else",
   "		{",
-  "			yy_size_t num_to_read =",
+  "			int num_to_read =",
   "			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;",
   "",
   "		while ( num_to_read <= 0 )",