diff --git a/modules/Whirling/Makefile b/modules/Whirling/Makefile
index 1fc6883..fa24dc8 100644
--- a/modules/Whirling/Makefile
+++ b/modules/Whirling/Makefile
@@ -31,7 +31,7 @@ else
 	CXXFLAGS += -D NDEBUG -O3
 endif
 
-LDLIBS := -lcairo -lscscreensaver
+LDLIBS := -lm -lcairo -lscscreensaver
 
 RM := /bin/rm -f
 INSTALL := /usr/bin/install -c