diff --git a/Grid/Makefile.am b/Grid/Makefile.am
index 8472dd71..8c7cb5c5 100644
--- a/Grid/Makefile.am
+++ b/Grid/Makefile.am
@@ -68,8 +68,10 @@ if BUILD_FERMION_REPS
 endif
 if BUILD_SP
     extra_sources+=$(SP_FERMION_FILES)
+if BUILD_FERMION_REPS
     extra_sources+=$(SP_TWOIND_FERMION_FILES)
 endif
+endif
 
 lib_LIBRARIES = libGrid.a