diff --git a/arch/arm/src/common/arm_hostfs.c b/arch/arm/src/common/arm_hostfs.c
index fbfd9a5248545..8c47a46138cb2 100644
--- a/arch/arm/src/common/arm_hostfs.c
+++ b/arch/arm/src/common/arm_hostfs.c
@@ -232,7 +232,9 @@ off_t host_lseek(int fd, off_t pos, off_t offset, int whence)
 
 int host_ioctl(int fd, int request, unsigned long arg)
 {
-  return -ENOSYS;
+  /* Unsupported ioctl requests use ENOTTY so VFS can apply fallbacks. */
+
+  return -ENOTTY;
 }
 
 void host_sync(int fd)
diff --git a/arch/arm64/src/common/arm64_hostfs.c b/arch/arm64/src/common/arm64_hostfs.c
index ddd064ed07d41..ff4419292c55e 100644
--- a/arch/arm64/src/common/arm64_hostfs.c
+++ b/arch/arm64/src/common/arm64_hostfs.c
@@ -232,7 +232,9 @@ off_t host_lseek(int fd, off_t pos, off_t offset, int whence)
 
 int host_ioctl(int fd, int request, unsigned long arg)
 {
-  return -ENOSYS;
+  /* Unsupported ioctl requests use ENOTTY so VFS can apply fallbacks. */
+
+  return -ENOTTY;
 }
 
 void host_sync(int fd)
diff --git a/arch/risc-v/src/common/riscv_hostfs.c b/arch/risc-v/src/common/riscv_hostfs.c
index c077044054ecb..8a87c74afdf51 100644
--- a/arch/risc-v/src/common/riscv_hostfs.c
+++ b/arch/risc-v/src/common/riscv_hostfs.c
@@ -232,7 +232,9 @@ off_t host_lseek(int fd, off_t pos, off_t offset, int whence)
 
 int host_ioctl(int fd, int request, unsigned long arg)
 {
-  return -ENOSYS;
+  /* Unsupported ioctl requests use ENOTTY so VFS can apply fallbacks. */
+
+  return -ENOTTY;
 }
 
 void host_sync(int fd)
diff --git a/arch/sim/src/sim/win/sim_hostfs.c b/arch/sim/src/sim/win/sim_hostfs.c
index 5cd0ad1ddf564..65f3208f085ea 100644
--- a/arch/sim/src/sim/win/sim_hostfs.c
+++ b/arch/sim/src/sim/win/sim_hostfs.c
@@ -224,7 +224,9 @@ nuttx_off_t host_lseek(int fd, nuttx_off_t pos, nuttx_off_t offset,
 
 int host_ioctl(int fd, int request, unsigned long arg)
 {
-  return -ENOSYS;
+  /* Unsupported ioctl requests use ENOTTY so VFS can apply fallbacks. */
+
+  return -ENOTTY;
 }
 
 /****************************************************************************
diff --git a/arch/xtensa/src/common/xtensa_hostfs.c b/arch/xtensa/src/common/xtensa_hostfs.c
index 74b711cf2ebba..d803bce9083d7 100644
--- a/arch/xtensa/src/common/xtensa_hostfs.c
+++ b/arch/xtensa/src/common/xtensa_hostfs.c
@@ -140,7 +140,9 @@ off_t host_lseek(int fd, off_t pos, off_t offset, int whence)
 
 int host_ioctl(int fd, int request, unsigned long arg)
 {
-  return -ENOSYS;
+  /* Unsupported ioctl requests use ENOTTY so VFS can apply fallbacks. */
+
+  return -ENOTTY;
 }
 
 void host_sync(int fd)