diff --git a/srcpkgs/clac/template b/srcpkgs/clac/template
index be982532d0..b45582566c 100644
--- a/srcpkgs/clac/template
+++ b/srcpkgs/clac/template
@@ -12,7 +12,7 @@ checksum=a7a2397fdbac93924ca83c72e2df2027029f54c8921b813230208dd167ed0c20
 
 do_build() {
 	${CC} ${CFLAGS} -o clac -I deps/sds -I deps/linenoise \
-		clac.c deps/sds/sds.c deps/linenoise/linenoise.c ${LDFLAGS}
+		clac.c deps/sds/sds.c deps/linenoise/linenoise.c ${LDFLAGS} -lm
 }
 do_install() {
 	vbin clac