diff --git a/kpdf/Makefile.am b/kpdf/Makefile.am
index a0f470987..1757765c4 100644
--- a/kpdf/Makefile.am
+++ b/kpdf/Makefile.am
@@ -44,7 +44,7 @@ kde_module_LTLIBRARIES = libkpdfpart.la
 # the Part's source, library search path, and link libraries
 libkpdfpart_la_SOURCES = QOutputDev.cpp QOutputDevPixmap.cpp QOutputDevKPrinter.cpp kpdf_part.cpp kpdf_pagewidget.cc part.cpp thumbnail.cpp thumbnaillist.cpp kpdf_error.cpp xpdf_errors.cpp
 libkpdfpart_la_LDFLAGS = -module $(KDE_PLUGIN) $(all_libraries)
-libkpdfpart_la_LIBADD  = ../xpdf/libxpdf.la $(LIB_KPARTS) $(LIB_KFILE) $(LIB_KDEPRINT) $(LIB_KUTILS)
+libkpdfpart_la_LIBADD  = ../xpdf/libxpdf.la $(LIB_KPARTS) $(LIB_KFILE) $(LIB_KDEPRINT) $(LIB_KUTILS) -lm
 
 # this is where the desktop file will go 
 partdesktopdir   = $(kde_servicesdir)