diff --git a/src/makefile.py b/src/makefile.py
index 5f4339b..8b1ff56 100644
--- a/src/makefile.py
+++ b/src/makefile.py
@@ -56,7 +56,7 @@ SRC=
 OBJ=
 LIB=
 
-include %s
+-include %s
 export
 
 %s: $(filter-out %s%%, $(wildcard */*.irp.f)) $(wildcard *.irp.f) $(wildcard *.inc.f) Makefile 
diff --git a/src/version.py b/src/version.py
index 26a0a01..4776ab8 100644
--- a/src/version.py
+++ b/src/version.py
@@ -1 +1 @@
-version = "1.6.7"
+version = "1.6.8"