diff --git a/include/kernel.mk b/include/kernel.mk
index 00d1b8c44c..519ea42d23 100644
--- a/include/kernel.mk
+++ b/include/kernel.mk
@@ -44,7 +44,7 @@ else
   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
   LINUX_SITE:=@KERNEL/linux/kernel/v$(KERNEL)$(TESTING) \
 
-  PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
+  PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
 endif
 GENERIC_PLATFORM_DIR := $(TOPDIR)/target/linux/generic-$(KERNEL)
 GENERIC_PATCH_DIR := $(GENERIC_PLATFORM_DIR)/patches$(shell [ -d "$(GENERIC_PLATFORM_DIR)/patches-$(KERNEL_PATCHVER)" ] && printf -- "-$(KERNEL_PATCHVER)" || true )
diff --git a/include/package.mk b/include/package.mk
index 254588e8a0..074c7aded1 100644
--- a/include/package.mk
+++ b/include/package.mk
@@ -7,7 +7,7 @@
 
 all: $(if $(DUMP),dumpinfo,compile)
 
-PKG_BUILD_DIR ?= $(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
+PKG_BUILD_DIR ?= $(BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
 PKG_INSTALL_DIR ?= $(PKG_BUILD_DIR)/ipkg-install
 PKG_MD5SUM ?= unknown