diff --git a/make/defs.mk b/make/defs.mk
index 3115c77b..299834a3 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -796,6 +796,18 @@ USE_FEEDFS                 = true
 LD_LIB_PATH               += $(FEEDFS_LOCAL_DIR)/lib
 endif
 
+ifeq ($(USE_FEEDFS_FMEMFS),true)
+FEEDFS_FMEMFS_DIR           = $(firstword $(wildcard $(CVS_PROJ_DIR)/feedfs-fmemfs /opt/$(FLAVOUR_PATH_PREFIX)feedfs-fmemfs))
+FEEDFS_FMEMFS_VERSION       = $(call version,$(FEEDFS_FMEMFS_DIR))
+RPM_REQUIRES_RUN          += $(FLAVOUR_PREFIX)feedfs-fmemfs-run = $(FEEDFS_FMEMFS_VERSION)
+RPM_REQUIRES_DEVEL        += $(FLAVOUR_PREFIX)feedfs-fmemfs-devel = $(FEEDFS_FMEMFS_VERSION)
+USE_FEEDFS                 = true
+# no build-time linkage necessary, no headers exported
+LD_LIB_PATH               += $(FEEDFS_FMEMFS_DIR)/lib
+INCLUDE                   += -I$(FEEDFS_FMEMFS_DIR)/include
+LIBFLAGS                  += -L$(FEEDFS_FMEMFS_DIR)/lib -lfeedfs-fmemfs
+endif
+
 ifeq ($(USE_FEEDFS_OBJECTS),true)
 FEEDFS_OBJECTS_DIR         = $(firstword $(wildcard $(CVS_PROJ_DIR)/feedfs-objects /opt/$(FLAVOUR_PATH_PREFIX)feedfs-objects))
 FEEDFS_OBJECTS_VERSION     = $(call version,$(FEEDFS_OBJECTS_DIR))