diff --git a/make/rpmdist.mk b/make/rpmdist.mk
index d55f3162..3d469019 100644
--- a/make/rpmdist.mk
+++ b/make/rpmdist.mk
@@ -24,7 +24,8 @@ FTP_HOST_LOGIN           ?= root
 RPM_PROJECT              ?= $(PROJECT)
 RPM_VERSION              ?= $(DIST_VERSION)
 LAST_RPM_VERSION_FILE     = $(TOPDIR)/LAST_RPM_VERSION$(FLAVOUR_SUFFIX)
-LAST_RPM_VERSION         ?= $(shell sh $(MOD_SCRIPT_DIR)/platform-map-file.sh -p $RPM_ARCH $(LAST_RPM_VERSION_FILE) read | $(SED) 's/-dev//'
+LAST_RPM_VERSION         ?= $(shell sh $(MOD_SCRIPT_DIR)/platform-map-file.sh \
+	-p $(OS)/$(RPM_ARCH) $(LAST_RPM_VERSION_FILE) read | $(SED) 's/-dev//'
 RPMBUILD                 ?= rpmbuild
 CHECK_CVS_SYNC_BEFORE_RPM_RELEASE ?= true
 HASH                      = $(shell $(cvs_files) | \