diff --git a/lib/Makefile b/lib/Makefile
index 68eb479..7f39d93 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -1,5 +1,5 @@
 SHLIBS= libCosmoTool.so
-SOURCES= loadRamses.cpp yorick.cpp miniargs.cpp  fortran.cpp interpolate.cpp load_data.cpp
+SOURCES= loadRamses.cpp yorick.cpp miniargs.cpp  fortran.cpp interpolate.cpp load_data.cpp powerSpectrum.cpp
 LIBS= -lnetcdf_c++ -lnetcdf -lgsl -lgslcblas -lm
 
 include config.mk
@@ -8,7 +8,7 @@ VPATH=../src
 
 all: $(SHLIBS)
 
-libCosmoTool.so: loadRamses.o yorick.o miniargs.o fortran.o interpolate.o load_data.o
+libCosmoTool.so: loadRamses.o yorick.o miniargs.o fortran.o interpolate.o load_data.o powerSpectrum.o
 
 depend: $(SOURCES)
 	@echo "[DEPENDS] $^"