diff --git a/src/runtime/c/pgf/reader.h b/src/runtime/c/pgf/reader.h
index 6fa24e6d2..61b00ab6f 100644
--- a/src/runtime/c/pgf/reader.h
+++ b/src/runtime/c/pgf/reader.h
@@ -47,6 +47,7 @@ pgf_reader_done(PgfReader* rdr, PgfPGF* pgf);
 
 
 // JIT specific interface
+#ifdef PGF_EVALUATOR_H_
 
 typedef struct PgfJitState PgfJitState;
 
@@ -67,5 +68,5 @@ pgf_jit_function(PgfReader* rdr, PgfAbstr* abstr,
 void
 pgf_jit_done(PgfReader* state, PgfAbstr* abstr);
 
-
+#endif
 #endif // READER_H_