diff --git a/ice-9/Makefile.am b/ice-9/Makefile.am
index 4e436295a..b38b88893 100644
--- a/ice-9/Makefile.am
+++ b/ice-9/Makefile.am
@@ -45,5 +45,5 @@ install-data-local:
 ## test.scm is not currently installed.
 EXTRA_DIST = $(ice9_sources) test.scm and-let-star-compat.scm
 
-psyntax.pp:
-	cd $(srcdir) && guile -c '(load-from-path "ice-9/syncase") (psyncomp)'
+psyntax.pp: psyntax.ss
+	cd $(srcdir) && guile -c '(load-from-path "ice-9/syncase") (define-module (ice-9 syncase)) (psyncomp)'