diff --git a/src/header/string/mod.rs b/src/header/string/mod.rs
index 8c8acb21613e0e96100d54b76344fd906a685c25..c402707f360a034c4756e688a2fb7919f72c3187 100644
--- a/src/header/string/mod.rs
+++ b/src/header/string/mod.rs
@@ -235,8 +235,10 @@ pub unsafe extern "C" fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: siz
     let len = strlen(msg);
 
     if len >= buflen {
-        memcpy(buf as *mut c_void, msg as *const c_void, buflen - 1);
-        *buf.add(buflen - 1) = 0;
+        if buflen != 0 {
+            memcpy(buf as *mut c_void, msg as *const c_void, buflen - 1);
+            *buf.add(buflen - 1) = 0;
+        }
         return ERANGE as c_int;
     }
     memcpy(buf as *mut c_void, msg as *const c_void, len + 1);
diff --git a/tests/error.c b/tests/error.c
index bb613b92239e30170482fde52dda1de9385f2f75..5cbe10385dd4ca3c03c89da32f9e5e412ca93607 100644
--- a/tests/error.c
+++ b/tests/error.c
@@ -19,4 +19,8 @@ int main(void) {
     char buf2[3];
     int ret2 = strerror_r(err, buf2, 3);
     printf("errno: %d = %s, return: %d\n", err, buf2, ret2);
+
+    char buf3[256];
+    int ret3 = strerror_r(err, buf3, 0);
+    printf("errno: %d = %s, return: %d\n", err, buf3, ret3);
 }
diff --git a/tests/expected/error.stdout b/tests/expected/error.stdout
index d1c1a211ff8f941db9dde9b85a068b78fa665341..4e744d1bfbee3507caf31c2fdd26aef8d605e865 100644
--- a/tests/expected/error.stdout
+++ b/tests/expected/error.stdout
@@ -1,3 +1,4 @@
 errno: 2 = No such file or directory
 errno: 2 = No such file or directory, return: 0
 errno: 2 = No, return: 34
+errno: 2 = , return: 34