diff --git a/test/fdcheck.hh b/test/fdcheck.hh
index f9b3f81d5b68196b6e73b297660a407e953604f9..056e47feb4b577a5f4a382c80e11e58a95e17a25 100644
--- a/test/fdcheck.hh
+++ b/test/fdcheck.hh
@@ -2,6 +2,7 @@
 #define ASSEMBLER_FINITE_DIFFERENCE_CHECK
 
 #include "src/rigidbodymotion.hh"
+#include "src/rodassembler.hh"
 
 #define ABORT_ON_ERROR