diff --git a/src/glsl/glcpp/pp.c b/src/glsl/glcpp/pp.c
index a54bcbe16d1..160c6662ff6 100644
--- a/src/glsl/glcpp/pp.c
+++ b/src/glsl/glcpp/pp.c
@@ -25,7 +25,6 @@
 #include <string.h>
 #include <ctype.h>
 #include "glcpp.h"
-#include "main/core.h" /* for isblank() on MSVC */
 
 void
 glcpp_error (YYLTYPE *locp, glcpp_parser_t *parser, const char *fmt, ...)