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diff --git a/src/verilog.y b/src/verilog.y
index 2f16ef23..1175542c 100644
--- a/src/verilog.y
+++ b/src/verilog.y
@@ -301,6 +301,15 @@ class AstSenTree;
// Bison 3.0 and newer
BISONPRE_VERSION(3.0,%define parse.error verbose)
+// We run bison with the -d argument. This tells it to generate a
+// header file with token names. Old versions of bison pasted the
+// contents of that file into the generated source as well; newer
+// versions just include it.
+//
+// Since we run bison through ../bisonpre, it doesn't know the correct
+// header file name, so we need to tell it.
+BISONPRE_VERSION(3.7,%define api.header.include {"V3ParseBison.h"})
+
// When writing Bison patterns we use yTOKEN instead of "token",
// so Bison will error out on unknown "token"s.
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