diff -ur cfitsio/cfitsio.pc.in cfitsio.new/cfitsio.pc.in
--- cfitsio/cfitsio.pc.in	2013-04-08 20:11:56.000000000 +0200
+++ cfitsio.new/cfitsio.pc.in	2013-07-10 18:28:36.698569315 +0200
@@ -7,5 +7,5 @@
 Description: FITS File Subroutine Library
 Version: @CFITSIO_MAJOR@.@CFITSIO_MINOR@
 Libs: -L${libdir} -lcfitsio @LIBS@
-Libs.private: -lm
-Cflags: -I${includedir}
+Libs.private: -lm -lz @LIBS@
+Cflags: -I${includedir} -D_REENTRANT