diff --git a/fs/common.mk b/fs/common.mk
index 5d07f00561..cac127feec 100644
--- a/fs/common.mk
+++ b/fs/common.mk
@@ -102,6 +102,8 @@ rootfs-$(1)-show-depends:
 
 rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1) $$(ROOTFS_$(2)_POST_TARGETS)
 
+.PHONY: rootfs-$(1) rootfs-$(1)-show-depends
+
 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 TARGETS_ROOTFS += rootfs-$(1)
 endif
diff --git a/fs/ext2/ext2.mk b/fs/ext2/ext2.mk
index 1cac72e0d5..cab66a5e24 100644
--- a/fs/ext2/ext2.mk
+++ b/fs/ext2/ext2.mk
@@ -35,6 +35,8 @@ endef
 rootfs-ext2-symlink:
 	ln -sf rootfs.ext2$(ROOTFS_EXT2_COMPRESS_EXT) $(BINARIES_DIR)/rootfs.ext$(BR2_TARGET_ROOTFS_EXT2_GEN)$(ROOTFS_EXT2_COMPRESS_EXT)
 
+.PHONY: rootfs-ext2-symlink
+
 ifneq ($(BR2_TARGET_ROOTFS_EXT2_GEN),2)
 ROOTFS_EXT2_POST_TARGETS += rootfs-ext2-symlink
 endif
diff --git a/fs/initramfs/initramfs.mk b/fs/initramfs/initramfs.mk
index 308924d574..db5081224c 100644
--- a/fs/initramfs/initramfs.mk
+++ b/fs/initramfs/initramfs.mk
@@ -17,6 +17,8 @@ rootfs-initramfs: $(ROOTFS_INITRAMFS_DEPENDENCIES) $(ROOTFS_INITRAMFS_POST_TARGE
 rootfs-initramfs-show-depends:
 	@echo $(ROOTFS_INITRAMFS_DEPENDENCIES)
 
+.PHONY: rootfs-initramfs rootfs-initramfs-show-depends
+
 ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
 TARGETS_ROOTFS += rootfs-initramfs
 endif
diff --git a/fs/iso9660/iso9660.mk b/fs/iso9660/iso9660.mk
index 5b44ba4241..4ccfce955c 100644
--- a/fs/iso9660/iso9660.mk
+++ b/fs/iso9660/iso9660.mk
@@ -48,6 +48,8 @@ rootfs-iso9660: $(BINARIES_DIR)/rootfs.iso9660
 rootfs-iso9660-show-depends:
 	@echo $(ROOTFS_ISO9660_DEPENDENCIES)
 
+.PHONY: rootfs-iso9660 rootfs-iso9660-show-depends
+
 ################################################################################
 #
 # Toplevel Makefile options