diff --git a/arch/arm/src/common/up_initialize.c b/arch/arm/src/common/up_initialize.c
index 2cb332671b6..b6109e1c9bf 100644
--- a/arch/arm/src/common/up_initialize.c
+++ b/arch/arm/src/common/up_initialize.c
@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 #include <nuttx/syslog/ramlog.h>
@@ -203,6 +204,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */
diff --git a/arch/avr/src/common/up_initialize.c b/arch/avr/src/common/up_initialize.c
index f44b421c6d0..f6273cb4e9b 100644
--- a/arch/avr/src/common/up_initialize.c
+++ b/arch/avr/src/common/up_initialize.c
@@ -43,6 +43,7 @@
 
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 #include <nuttx/syslog/ramlog.h>
@@ -235,6 +236,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */
diff --git a/arch/hc/src/common/up_initialize.c b/arch/hc/src/common/up_initialize.c
index 5628c3aaecd..6b2495f728d 100644
--- a/arch/hc/src/common/up_initialize.c
+++ b/arch/hc/src/common/up_initialize.c
@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 #include <nuttx/syslog/ramlog.h>
@@ -159,6 +160,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */
diff --git a/arch/mips/src/common/up_initialize.c b/arch/mips/src/common/up_initialize.c
index 1274772249a..3588057b1de 100644
--- a/arch/mips/src/common/up_initialize.c
+++ b/arch/mips/src/common/up_initialize.c
@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 #include <nuttx/syslog/ramlog.h>
@@ -161,6 +162,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */
diff --git a/arch/sh/src/common/up_initialize.c b/arch/sh/src/common/up_initialize.c
index f4e067489f8..3b19140ac08 100644
--- a/arch/sh/src/common/up_initialize.c
+++ b/arch/sh/src/common/up_initialize.c
@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 #include <nuttx/syslog/ramlog.h>
@@ -146,6 +147,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */
diff --git a/arch/sim/src/up_initialize.c b/arch/sim/src/up_initialize.c
index 667a618d491..4bf85707a00 100644
--- a/arch/sim/src/up_initialize.c
+++ b/arch/sim/src/up_initialize.c
@@ -43,6 +43,7 @@
 
 #include <nuttx/arch.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/fs/ioctl.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
@@ -149,6 +150,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
 #if defined(USE_DEVCONSOLE)
diff --git a/arch/x86/src/common/up_initialize.c b/arch/x86/src/common/up_initialize.c
index 21d4eba7cb7..d395c2d654f 100644
--- a/arch/x86/src/common/up_initialize.c
+++ b/arch/x86/src/common/up_initialize.c
@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 #include <nuttx/syslog/ramlog.h>
@@ -161,6 +162,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */
diff --git a/arch/z16/src/common/up_initialize.c b/arch/z16/src/common/up_initialize.c
index 747d448b0cb..2932c50f17c 100644
--- a/arch/z16/src/common/up_initialize.c
+++ b/arch/z16/src/common/up_initialize.c
@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 #include <nuttx/syslog/ramlog.h>
@@ -165,6 +166,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */
diff --git a/arch/z80/src/common/up_initialize.c b/arch/z80/src/common/up_initialize.c
index 2bc7420c391..67aad82a37d 100644
--- a/arch/z80/src/common/up_initialize.c
+++ b/arch/z80/src/common/up_initialize.c
@@ -44,6 +44,7 @@
 #include <nuttx/arch.h>
 #include <nuttx/board.h>
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/loop.h>
 #include <nuttx/net/loopback.h>
 #include <nuttx/net/tun.h>
 
@@ -157,6 +158,9 @@ void up_initialize(void)
   devzero_register();   /* Standard /dev/zero */
 #endif
 
+#if defined(CONFIG_DEV_LOOP)
+  loop_register();      /* Standard /dev/loop */
+#endif
 #endif /* CONFIG_NFILE_DESCRIPTORS */
 
   /* Initialize the serial device driver */