1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index b3ef265..e0f7f62 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,7 @@ CFLAGS  != pkg-config --cflags ${LIBS}
 LFLAGS  != pkg-config --libs ${LIBS}
 
 CFLAGS  += -DX11
+LFLAGS  += -lm
 
 ${PROG}: ${OBJ}
 	${CC} ${OBJ} -o $@ ${LFLAGS}