diff --git a/docs/manual/adding-packages-luarocks.txt b/docs/manual/adding-packages-luarocks.txt
index 4965a209ae..ec3d4e7ccd 100644
--- a/docs/manual/adding-packages-luarocks.txt
+++ b/docs/manual/adding-packages-luarocks.txt
@@ -82,7 +82,8 @@ Two of them are populated by the LuaRocks infrastructure (for the
 
 * +LUA_FOO_SITE+, which defaults to +$(BR2_LUAROCKS_MIRROR)+
 
-* +LUA_FOO_SOURCE+, which defaults to +$(LUA_FOO_NAME_UPSTREAM)-$(LUA_FOO_VERSION).src.rock+
+* +LUA_FOO_SOURCE+, which defaults to
+  +$(lowercase LUA_FOO_NAME_UPSTREAM)-$(LUA_FOO_VERSION).src.rock+
 
 A few additional variables, specific to the LuaRocks infrastructure, are
 also defined. They can be overridden in specific cases.
@@ -91,7 +92,7 @@ also defined. They can be overridden in specific cases.
   package name
 
 * +LUA_FOO_ROCKSPEC+, which defaults to
-  +$(LUA_FOO_NAME_UPSTREAM)-$(LUA_FOO_VERSION).rockspec+
+  +$(lowercase LUA_FOO_NAME_UPSTREAM)-$(LUA_FOO_VERSION).rockspec+
 
 * +LUA_FOO_SUBDIR+, which defaults to
   +$(LUA_FOO_NAME_UPSTREAM)-$(LUA_FOO_VERSION_WITHOUT_ROCKSPEC_REVISION)+
diff --git a/package/pkg-luarocks.mk b/package/pkg-luarocks.mk
index 2689035cdc..d762867111 100644
--- a/package/pkg-luarocks.mk
+++ b/package/pkg-luarocks.mk
@@ -36,8 +36,8 @@ define inner-luarocks-package
 $(2)_BUILD_OPTS		?=
 $(2)_NAME_UPSTREAM	?= $(1)
 $(2)_SUBDIR		?= $$($(2)_NAME_UPSTREAM)-$$(shell echo "$$($(2)_VERSION)" | sed -e "s/-[0-9]$$$$//")
-$(2)_ROCKSPEC		?= $$($(2)_NAME_UPSTREAM)-$$($(2)_VERSION).rockspec
-$(2)_SOURCE		?= $$($(2)_NAME_UPSTREAM)-$$($(2)_VERSION).src.rock
+$(2)_ROCKSPEC		?= $$(call LOWERCASE,$$($(2)_NAME_UPSTREAM))-$$($(2)_VERSION).rockspec
+$(2)_SOURCE		?= $$(call LOWERCASE,$$($(2)_NAME_UPSTREAM))-$$($(2)_VERSION).src.rock
 $(2)_SITE		?= $$(call qstrip,$$(BR2_LUAROCKS_MIRROR))
 
 # Since we do not support host-luarocks-package, we know this is