diff --git a/unicodedomino.sty b/unicodedomino.sty
index ca75a92769d8f1b83072e0500534d32d676cc758..922ee6d89fb114e0967a01189706d42e43e6cd4f 100644
--- a/unicodedomino.sty
+++ b/unicodedomino.sty
@@ -44,7 +44,7 @@
 \fi%
 
 % pull code from other files
-\input{unicodedomino_kernel_fixup.def}%
+\input{unicodedomino_kernel_fixup_f4_and_checkseq.def}%
 \input{unicodedomino_kernel_cosmetics.def}%
 \input{unicodedomino_compat.def}%
 
diff --git a/unicodedomino_kernel_fixup.def b/unicodedomino_kernel_fixup_f4_and_checkseq.def
similarity index 100%
rename from unicodedomino_kernel_fixup.def
rename to unicodedomino_kernel_fixup_f4_and_checkseq.def