diff --git a/repos/dde_linux/src/lib/libc_lxip/plugin.cc b/repos/dde_linux/src/lib/libc_lxip/plugin.cc
index e57fc7975..e9899b7a0 100644
--- a/repos/dde_linux/src/lib/libc_lxip/plugin.cc
+++ b/repos/dde_linux/src/lib/libc_lxip/plugin.cc
@@ -164,6 +164,26 @@ struct Plugin : Libc::Plugin
 	int  retrieve_and_clear_fds(int nfds, struct fd_set *fds, struct fd_set *in);
 	int  translate_msg_flags(int bsd_flags);
 	int  translate_ops_linux(int optname);
+
+	::ssize_t getdirentries(Libc::File_descriptor *fd, char *buf, ::size_t nbytes,
+	                        ::off_t *basep)
+	{
+		Genode::error(__FILE__, ":", __LINE__, " ", __func__, "not implemented");
+		return 0UL;
+	}
+
+	void *mmap(void *addr, ::size_t length, int prot, int flags,
+	           Libc::File_descriptor *, ::off_t offset)
+	{
+		Genode::error(__FILE__, ":", __LINE__, " ", __func__, "not implemented");
+		return nullptr;
+	}
+
+	int msync(void *addr, ::size_t len, int flags)
+	{
+		Genode::error(__FILE__, ":", __LINE__, " ", __func__, "not implemented");
+		return 0;
+	}
 };
 
 
diff --git a/repos/libports/src/lib/libc_resolv/plugin.cc b/repos/libports/src/lib/libc_resolv/plugin.cc
index 23a75a32b..89702dcc5 100644
--- a/repos/libports/src/lib/libc_resolv/plugin.cc
+++ b/repos/libports/src/lib/libc_resolv/plugin.cc
@@ -79,6 +79,25 @@ namespace {
 				return ::libc_freeaddrinfo(res);
 			}
 
+			::ssize_t getdirentries(Libc::File_descriptor *fd, char *buf, ::size_t nbytes,
+			                        ::off_t *basep)
+			{
+				Genode::error(__FILE__, ":", __LINE__, " ", __func__, "not implemented");
+				return 0UL;
+			}
+
+			void *mmap(void *addr, ::size_t length, int prot, int flags,
+			           Libc::File_descriptor *, ::off_t offset)
+			{
+				Genode::error(__FILE__, ":", __LINE__, " ", __func__, "not implemented");
+				return nullptr;
+			}
+
+			int msync(void *addr, ::size_t len, int flags)
+			{
+				Genode::error(__FILE__, ":", __LINE__, " ", __func__, "not implemented");
+				return 0;
+			}
 	};
 
 } /* unnamed namespace */