diff --git a/src/core/sys/posix/string.d b/src/core/sys/posix/string.d
index 83744a9121..e17dfc66d3 100644
--- a/src/core/sys/posix/string.d
+++ b/src/core/sys/posix/string.d
@@ -19,7 +19,6 @@ extern(C):
 @system:
 nothrow:
 @nogc:
-@system:
 
 /// Exposes `locale_t` as defined in `core.sys.posix.locale` (`<locale.h>`)
 public import core.sys.posix.locale : locale_t;