diff --git a/src/mono/mono/sgen/gc-internal-agnostic.h b/src/mono/mono/sgen/gc-internal-agnostic.h
index 73d431d54d8c7..581cdb4896e1b 100644
--- a/src/mono/mono/sgen/gc-internal-agnostic.h
+++ b/src/mono/mono/sgen/gc-internal-agnostic.h
@@ -110,7 +110,7 @@ word aligned or size is not a multiple of word size.
 */
 void mono_gc_bzero_atomic (void *dest, size_t size);
 void mono_gc_bzero_aligned (void *dest, size_t size);
-void mono_gc_memmove_atomic (void *dest, const void *src, size_t size);
+MONO_COMPONENT_API void mono_gc_memmove_atomic (void *dest, const void *src, size_t size);
 void mono_gc_memmove_aligned (void *dest, const void *src, size_t size);
 
 FILE *mono_gc_get_logfile (void);