diff --git a/init/Android.mk b/init/Android.mk
index 6cd47f476..325614e3a 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -30,6 +30,10 @@ endif
 
 init_options += -DLOG_UEVENTS=0
 
+ifeq ($(TARGET_USER_MODE_LINUX), true)
+    init_cflags += -DUSER_MODE_LINUX
+endif
+
 init_cflags += \
     $(init_options) \
     -Wall -Wextra \
diff --git a/init/init.cpp b/init/init.cpp
index 0562dad2b..ec43cb438 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -379,7 +379,10 @@ static int set_mmap_rnd_bits_action(const std::vector<std::string>& args)
     int ret = -1;
 
     /* values are arch-dependent */
-#if defined(__aarch64__)
+#if defined(USER_MODE_LINUX)
+    /* uml does not support mmap_rnd_bits */
+    ret = 0;
+#elif defined(__aarch64__)
     /* arm64 supports 18 - 33 bits depending on pagesize and VA_SIZE */
     if (set_mmap_rnd_bits_min(33, 24, false)
             && set_mmap_rnd_bits_min(16, 16, true)) {