diff --git a/package/ply/ply.mk b/package/ply/ply.mk
index 0e4141f650..b72b29f315 100644
--- a/package/ply/ply.mk
+++ b/package/ply/ply.mk
@@ -10,5 +10,6 @@ PLY_AUTORECONF = YES
 PLY_LICENSE = GPL-2.0
 PLY_LICENSE_FILES = COPYING
 PLY_INSTALL_STAGING = YES
+PLY_DEPENDENCIES = host-flex host-bison
 
 $(eval $(autotools-package))