diff --git a/src/core/stdc/string.d b/src/core/stdc/string.d
index 8135cfe9b5..e3c6e2ebb5 100644
--- a/src/core/stdc/string.d
+++ b/src/core/stdc/string.d
@@ -106,6 +106,11 @@ else version (CRuntime_Bionic)
     ///
     int strerror_r(int errnum, scope char* buf, size_t buflen);
 }
+else version (CRuntime_Musl)
+{
+    ///
+    int strerror_r(int errnum, scope char *buf, size_t buflen);
+}
 ///
 pure size_t strlen(scope const char* s);
 ///