--- src/Makefile.in.orig	2012-08-13 16:37:12.015968320 +0200
+++ src/Makefile.in	2012-08-13 16:37:23.241696012 +0200
@@ -294,6 +294,7 @@ pcmanfm_LDADD = \
 	$(GMODULE_LIBS) \
 	$(FM_LIBS) \
 	$(MENU_CACHE_LIBS) \
+	-lm \
 	$(NULL)
 
 xml_purge_SOURCES = xml-purge.c