diff --git a/samples/native-lib/README.md b/samples/native-lib/README.md
index 668d28b6..ae052b93 100644
--- a/samples/native-lib/README.md
+++ b/samples/native-lib/README.md
@@ -6,7 +6,7 @@ The native library should provide `get_native_lib` API for iwasm to return the n
 
 ```C
 static int
-foo_wrapper(wasm_exec_env_t *exec_env, int x, int y)
+foo_wrapper(wasm_exec_env_t exec_env, int x, int y)
 {
     return x + y;
 }
diff --git a/samples/native-lib/test_add.c b/samples/native-lib/test_add.c
index d66ba81f..ac44c619 100644
--- a/samples/native-lib/test_add.c
+++ b/samples/native-lib/test_add.c
@@ -9,7 +9,7 @@
 #include "wasm_export.h"
 
 static int
-test_add_wrapper(wasm_exec_env_t *exec_env, int x, int y)
+test_add_wrapper(wasm_exec_env_t exec_env, int x, int y)
 {
     return x + y;
 }
diff --git a/samples/native-lib/test_sqrt.c b/samples/native-lib/test_sqrt.c
index e867a2c9..ecf7c989 100644
--- a/samples/native-lib/test_sqrt.c
+++ b/samples/native-lib/test_sqrt.c
@@ -9,7 +9,7 @@
 #include "wasm_export.h"
 
 static int
-test_sqrt_wrapper(wasm_exec_env_t *exec_env, int x, int y)
+test_sqrt_wrapper(wasm_exec_env_t exec_env, int x, int y)
 {
     return x * x + y * y;
 }