--- fftw3-static-3.3.5~git20160520.orig/fftw.pc.in
+++ fftw3-static-3.3.5~git20160520/fftw.pc.in
@@ -6,6 +6,6 @@ includedir=@includedir@
 Name: FFTW
 Description: fast Fourier transform library
 Version: @VERSION@
-Libs: -L${libdir} -lfftw3@PREC_SUFFIX@ @LIBQUADMATH@
+Libs: -L${libdir} -lfftw3@PREC_SUFFIX@ @LIBQUADMATH@ -lpthread -lm
 Libs.private: -lm
 Cflags: -I${includedir}