diff --git a/src/Makefile.am b/src/Makefile.am
index a537b1c..6a22856 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -8,4 +8,5 @@ AM_CFLAGS = -Wall -ffast-math $(FFTW3F_CFLAGS)
 lib_LTLIBRARIES = libosmodsp.la
 
 libosmodsp_la_SOURCES = cfile.c cxvec.c cxvec_math.c iqbal.c
-libosmodsp_la_LDFLAGS = -version-info $(LIBVERSION) $(FFTW3F_LIBS)
+libosmodsp_la_LDFLAGS = -version-info $(LIBVERSION)
+libosmodsp_la_LIBADD = $(FFTW3F_LIBS)