1 files changed, 2 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 1993b3f..596f2a3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 CS=ast.c com.c dis.c ht.c mem.c prs.c read.c state.c val.c vm.c
 HS=ast.h       dis.h ht.h mem.h prs.h read.h state.h val.h vm.h
-CFLAGS=-O3 -Wall -Wpedantic -Werror=implicit-function-declaration
+CFLAGS=-O3 -lm -Wall -Wpedantic -Werror=implicit-function-declaration
 
-bþ: $(CS) $(HS)
+bþ: $(CS) $(HS) Makefile
 	$(CC) $(CFLAGS) -o bþ $(CS)
 
 prs.c: g.peg