diff --git a/Makefile b/Makefile
index c816215..aff6c53 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,7 @@ OBJS=Implicit.o \
 	 Mesh.o \
 	 spheroid.o \
 	 Ball.o \
+	 PerlinNoise.o \
 	 util/ObjParser.o \
 	 MarchingCubes.o \
 	 _gen/marching_cubes_data.o \