diff --git a/ftp/pureadmin/Makefile b/ftp/pureadmin/Makefile
index a0a0f89e6d9a..0fbc66a26bb8 100644
--- a/ftp/pureadmin/Makefile
+++ b/ftp/pureadmin/Makefile
@@ -16,7 +16,7 @@ GNU_CONFIGURE=	yes
 INSTALLS_ICONS=	yes
 
 CPPFLAGS+=	-I${LOCALBASE}/include ${PTHREAD_CFLAGS}
-LDFLAGS+=	-L${LOCALBASE}/lib ${PTHREAD_LIBS}
+LDFLAGS+=	-L${LOCALBASE}/lib -lm ${PTHREAD_LIBS}
 
 PORTDOCS=	index.txt introduction.txt main_window.txt \
 		preferences.txt user_manager.txt