diff --git a/mibuild/lattice/diamond.py b/mibuild/lattice/diamond.py
index dbbc99ae1..3a12456cf 100644
--- a/mibuild/lattice/diamond.py
+++ b/mibuild/lattice/diamond.py
@@ -40,6 +40,8 @@ def _build_lpf(named_sc, named_pc):
 def _build_files(device, sources, vincpaths, build_name):
 	tcl = []
 	tcl.append("prj_project new -name \"%s\" -impl \"implementation\" -dev %s -synthesis \"synplify\"" %(build_name, device))
+	for path in vincpaths:
+		tcl.append("prj_impl option {include path} {\"" + path.replace("\\", "/") + "\"}")
 	for filename, language in sources:
 		tcl.append("prj_src add \"" + filename.replace("\\", "/") + "\"")
 	tcl.append("prj_run Synthesis -impl implementation -forceOne")