Index: trunk/psLib/pslib.pc.in
===================================================================
--- trunk/psLib/pslib.pc.in	(revision 10528)
+++ trunk/psLib/pslib.pc.in	(revision 38037)
@@ -7,5 +7,5 @@
 Description: Pan-STARRS Library
 Version: @VERSION@
-Libs: -L${libdir} -lpslib
+Libs: -L${libdir} -lpslib -lm
 Libs.private: @PSLIB_LIBS@
 Cflags: -I${includedir} @PSLIB_CFLAGS@