diff --git a/build-scripts/config_common.cmake b/build-scripts/config_common.cmake
index 210f2d7887..43510c5fde 100644
--- a/build-scripts/config_common.cmake
+++ b/build-scripts/config_common.cmake
@@ -201,6 +201,9 @@ elseif (WAMR_BUILD_LIBC_WASI EQUAL 1)
 else ()
   message ("     Libc WASI disabled")
 endif ()
+if (WAMR_BUILD_ENABLE_LIBC_WASI_SYNC_FLAGS EQUAL 1)
+  message ("     Libc WASI file descriptor sync flags enabled")
+endif()
 if ((WAMR_BUILD_FAST_INTERP EQUAL 1) AND (WAMR_BUILD_INTERP EQUAL 1))
   add_definitions (-DWASM_ENABLE_FAST_INTERP=1)
   message ("     Fast interpreter enabled")
diff --git a/core/iwasm/libraries/libc-wasi/libc_wasi.cmake b/core/iwasm/libraries/libc-wasi/libc_wasi.cmake
index d72c42a063..86b56edd63 100644
--- a/core/iwasm/libraries/libc-wasi/libc_wasi.cmake
+++ b/core/iwasm/libraries/libc-wasi/libc_wasi.cmake
@@ -5,6 +5,10 @@ set (LIBC_WASI_DIR ${CMAKE_CURRENT_LIST_DIR})
 
 add_definitions (-DWASM_ENABLE_LIBC_WASI=1)
 
+if (WAMR_BUILD_ENABLE_LIBC_WASI_SYNC_FLAGS EQUAL 1)
+    add_definitions (-DCONFIG_HAS_LIBC_WASI_SYNC_FLAGS=1)
+endif()
+
 include_directories(${LIBC_WASI_DIR}/sandboxed-system-primitives/include
                     ${LIBC_WASI_DIR}/sandboxed-system-primitives/src)
 
diff --git a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
index eda65b8da4..5cb1dea7ae 100644
--- a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
+++ b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
@@ -1970,6 +1970,11 @@ wasmtime_ssp_path_open(wasm_exec_env_t exec_env, struct fd_table *curfds,
     // Convert file descriptor flags.
     if ((fs_flags & __WASI_FDFLAG_APPEND) != 0)
         noflags |= O_APPEND;
+    if ((fs_flags & __WASI_FDFLAG_NONBLOCK) != 0)
+        noflags |= O_NONBLOCK;
+    if (write && (noflags & (O_APPEND | O_TRUNC)) == 0)
+        needed_inheriting |= __WASI_RIGHT_FD_SEEK;
+#if CONFIG_HAS_LIBC_WASI_SYNC_FLAGS != 0
     if ((fs_flags & __WASI_FDFLAG_DSYNC) != 0) {
 #ifdef O_DSYNC
         noflags |= O_DSYNC;
@@ -1978,8 +1983,6 @@ wasmtime_ssp_path_open(wasm_exec_env_t exec_env, struct fd_table *curfds,
 #endif
         needed_inheriting |= __WASI_RIGHT_FD_DATASYNC;
     }
-    if ((fs_flags & __WASI_FDFLAG_NONBLOCK) != 0)
-        noflags |= O_NONBLOCK;
     if ((fs_flags & __WASI_FDFLAG_RSYNC) != 0) {
 #ifdef O_RSYNC
         noflags |= O_RSYNC;
@@ -1992,8 +1995,16 @@ wasmtime_ssp_path_open(wasm_exec_env_t exec_env, struct fd_table *curfds,
         noflags |= O_SYNC;
         needed_inheriting |= __WASI_RIGHT_FD_SYNC;
     }
-    if (write && (noflags & (O_APPEND | O_TRUNC)) == 0)
-        needed_inheriting |= __WASI_RIGHT_FD_SEEK;
+#else
+    // It's not clear whether we want to support these flags in the standard
+    // yet: https://github.com/WebAssembly/wasi-filesystem/issues/98 so disable
+    // them by default in the meanwhile.
+    if (((fs_flags & __WASI_FDFLAG_DSYNC) != 0)
+        || ((fs_flags & __WASI_FDFLAG_RSYNC) != 0)
+        || ((fs_flags & __WASI_FDFLAG_SYNC) != 0)) {
+        return __WASI_ENOTSUP;
+    }
+#endif /* end of CONFIG_HAS_LIBC_WASI_SYNC_FLAGS */
 
     struct path_access pa;
     __wasi_errno_t error =
diff --git a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h
index f5e130a9ee..8519662655 100644
--- a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h
+++ b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h
@@ -134,4 +134,8 @@ not implemented until 4.9. See
 #define CONFIG_HAS_D_INO 0
 #endif
 
+#ifndef CONFIG_HAS_LIBC_WASI_SYNC_FLAGS
+#define CONFIG_HAS_LIBC_WASI_SYNC_FLAGS 0
+#endif
+
 #endif
diff --git a/doc/build_wamr.md b/doc/build_wamr.md
index 9938eadcbe..b98e5894a7 100644
--- a/doc/build_wamr.md
+++ b/doc/build_wamr.md
@@ -55,6 +55,8 @@ cmake -DWAMR_BUILD_PLATFORM=linux -DWAMR_BUILD_TARGET=ARM
 
 - **WAMR_BUILD_LIBC_WASI**=1/0, build the [WASI](https://github.com/WebAssembly/WASI) libc subset for WASM app, default to enable if not set
 
+- **WAMR_BUILD_LIBC_WASI_ENABLE_SYNC_FLAGS**=1/0, enable support for the file descriptor flags [`FDFLAGS_DSYNC`](https://docs.rs/wasi/latest/wasi/constant.FDFLAGS_DSYNC.html), [`FDFLAGS_RSYNC`](https://docs.rs/wasi/latest/wasi/constant.FDFLAGS_RSYNC.html) and [`FDFLAGS_DSYNC`](https://docs.rs/wasi/latest/wasi/constant.FDFLAGS_DSYNC.html), default to disable if not set. If enabled, support is dependent on the host OS. 
+
 - **WAMR_BUILD_LIBC_UVWASI**=1/0 (Experiment), build the [WASI](https://github.com/WebAssembly/WASI) libc subset for WASM app based on [uvwasi](https://github.com/nodejs/uvwasi) implementation, default to disable if not set
 
 > Note: for platform which doesn't support **WAMR_BUILD_LIBC_WASI**, e.g. Windows, developer can try using **WAMR_BUILD_LIBC_UVWASI**.
diff --git a/product-mini/platforms/nuttx/wamr.mk b/product-mini/platforms/nuttx/wamr.mk
index 04a6db91fd..10b0b214df 100644
--- a/product-mini/platforms/nuttx/wamr.mk
+++ b/product-mini/platforms/nuttx/wamr.mk
@@ -246,6 +246,9 @@ ifeq ($(CONFIG_INTERPRETERS_WAMR_LIBC_WASI),y)
 CFLAGS += -DWASM_ENABLE_LIBC_WASI=1
 CFLAGS += -I$(IWASM_ROOT)/libraries/libc-wasi/sandboxed-system-primitives/src
 CFLAGS += -I$(IWASM_ROOT)/libraries/libc-wasi/sandboxed-system-primitives/include
+ifeq ($(CONFIG_INTERPRETERS_WAMR_LIBC_WASI_SYNC_FLAGS),y)
+CFLAGS += -DCONFIG_HAS_LIBC_WASI_SYNC_FLAGS=1
+endif
 CSRCS += blocking_op.c
 CSRCS += posix_socket.c
 CSRCS += libc_wasi_wrapper.c