diff --git a/src/compiler/glsl/builtin_variables.cpp b/src/compiler/glsl/builtin_variables.cpp
index 24d0d403328..869d4523f6c 100644
--- a/src/compiler/glsl/builtin_variables.cpp
+++ b/src/compiler/glsl/builtin_variables.cpp
@@ -319,7 +319,7 @@ public:
    const glsl_type *construct_interface_instance() const;
 
 private:
-   glsl_struct_field fields[11];
+   glsl_struct_field fields[14];
    unsigned num_fields;
 };