diff --git a/Makefile b/Makefile
index 79ae75eb83d5e263fda2c8b3469c03ca9f9df6de..c200a4c4e6c80b119dd9756d38db4d4c1d1e929a 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ COQ_VERSION=$(shell coqc --version | egrep -o 'version 8.[0-9]' | egrep -o '8.[0
 COQ_MAKEFILE_FLAGS ?=
 
 ifeq ($(COQ_VERSION), 8.6)
-	COQ_MAKEFILE_FLAGS += -arg -w -arg -notation-overridden,-redundant-canonical-projection
+	COQ_MAKEFILE_FLAGS += -arg -w -arg -notation-overridden,-redundant-canonical-projection,-several-object-files
 endif
 
 # Forward most targets to Coq makefile (with some trick to make this phony)