diff --git a/fs/common.mk b/fs/common.mk
index 9a7758ff49..5b612a3f41 100644
--- a/fs/common.mk
+++ b/fs/common.mk
@@ -96,13 +96,13 @@ endif
 		echo "echo '$$(TERM_BOLD)>>>   Executing fakeroot script $$(s)$$(TERM_RESET)'" >> $$(FAKEROOT_SCRIPT); \
 		echo $$(s) $$(TARGET_DIR) $$(BR2_ROOTFS_POST_SCRIPT_ARGS) >> $$(FAKEROOT_SCRIPT)$$(sep))
 	$$(foreach hook,$$(ROOTFS_PRE_CMD_HOOKS),\
-		$$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT))
+		$$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 ifeq ($$(BR2_REPRODUCIBLE),y)
 	echo "find $$(TARGET_DIR) -print0 | xargs -0 -r touch -hd @$$(SOURCE_DATE_EPOCH)" >> $$(FAKEROOT_SCRIPT)
 endif
 	$$(call PRINTF,$$(ROOTFS_$(2)_CMD)) >> $$(FAKEROOT_SCRIPT)
 	$$(foreach hook,$$(ROOTFS_POST_CMD_HOOKS),\
-		$$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT))
+		$$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 	chmod a+x $$(FAKEROOT_SCRIPT)
 	PATH=$$(BR_PATH) $$(HOST_DIR)/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
 	$$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)