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diff --git a/mono/metadata/sgen-alloc.c b/mono/metadata/sgen-alloc.c
index 12beef8..aa475bc 100644
--- a/mono/metadata/sgen-alloc.c
+++ b/mono/metadata/sgen-alloc.c
@@ -93,7 +93,7 @@ static __thread char *tlab_next;
static __thread char *tlab_temp_end;
static __thread char *tlab_real_end;
/* Used by the managed allocator/wbarrier */
-static __thread char **tlab_next_addr;
+static __thread char **tlab_next_addr MONO_ATTR_USED;
#endif
#ifdef HAVE_KW_THREAD
diff --git a/mono/utils/mono-compiler.h b/mono/utils/mono-compiler.h
index 6cb60f2..a910e91 100644
--- a/mono/utils/mono-compiler.h
+++ b/mono/utils/mono-compiler.h
@@ -7,13 +7,19 @@
*/
#include <config.h>
+#ifdef __GNUC__
+#define MONO_ATTR_USED __attribute__ ((used))
+#else
+#define MONO_ATTR_USED
+#endif
+
#ifdef HAVE_KW_THREAD
#define MONO_HAVE_FAST_TLS
#define MONO_FAST_TLS_SET(x,y) x = y
#define MONO_FAST_TLS_GET(x) x
#define MONO_FAST_TLS_INIT(x)
-#define MONO_FAST_TLS_DECLARE(x) static __thread gpointer x MONO_TLS_FAST;
+#define MONO_FAST_TLS_DECLARE(x) static __thread gpointer x MONO_TLS_FAST MONO_ATTR_USED;
#if HAVE_TLS_MODEL_ATTR
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