diff --git a/src/compiler/glsl/glcpp/glcpp-lex.l b/src/compiler/glsl/glcpp/glcpp-lex.l
index f4a68767010..381b97364a3 100644
--- a/src/compiler/glsl/glcpp/glcpp-lex.l
+++ b/src/compiler/glsl/glcpp/glcpp-lex.l
@@ -175,7 +175,7 @@ glcpp_lex_update_state_per_token (glcpp_parser_t *parser, int token)
 
 SPACE		[[:space:]]
 NONSPACE	[^[:space:]]
-HSPACE		[ \t]
+HSPACE		[ \t\v\f]
 HASH		#
 NEWLINE		(\r\n|\n\r|\r|\n)
 IDENTIFIER	[_a-zA-Z][_a-zA-Z0-9]*