diff --git a/cosmo-kuroko/Dockerfile b/cosmo-kuroko/Dockerfile
index 83184c4..523d540 100644
--- a/cosmo-kuroko/Dockerfile
+++ b/cosmo-kuroko/Dockerfile
@@ -90,6 +90,7 @@ $'/CFLAGS += -DKRK_DISABLE_THREADS/a\\\
 else\\\n\
   CFLAGS += -DKRK_MEDIOCRE_TLS\
 ' \
+'/shell tools\/can-floor-without-libm\.sh/,/endif/d' \
 \
  && { diff -NrU3 /kuroko.orig/ /kuroko/ > /kuroko.patch; [ $? -le 1 ]; }
 # diff exit status is normally 0 or 1, anything greater is an error.