diff --git a/config.mk b/config.mk
index 8f0179a3febc089639057a4354ba7cc8e2ae3f15..e44725f78e52bf1e6b72260bcbed181c47cdb8fb 100644
--- a/config.mk
+++ b/config.mk
@@ -32,4 +32,4 @@ dmalloc = -DWITH_DMALLOC
 CFLAGS += ${xinerama} -DPREFIX=\"${PREFIX}\" \
 	-DPACKAGE=\"${PACKAGE}\" -DVERSION=\"${VERSION}\"
 
-LDFLAGS += -lpng -lX11 -lImlib2 -lgiblib ${xinerama_ld}
+LDFLAGS += -lm -lpng -lX11 -lImlib2 -lgiblib ${xinerama_ld}