diff --git a/Makefile b/Makefile
index a3c117f..f56e7c0 100644
--- a/Makefile
+++ b/Makefile
@@ -11,4 +11,4 @@ files += include/encrypter.h
 
 main:
 	@echo Compiling...
-	cc $(files) -o out/why2
\ No newline at end of file
+	cc $(files) -lm -o out/why2
\ No newline at end of file