1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 1cc019b..4677bc2 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ opt: CFLAGS += -Oz
 opt: pez
 
 pez: repl.c pez.c pez.h
-	$(CC) -o$@ -lreadline $(CFLAGS) repl.c pez.c
+	$(CC) -o$@ -lm -lreadline $(CFLAGS) repl.c pez.c
 
 clean:
 	$(RM) pez