1 files changed, 3 insertions, 0 deletions

diff --git a/src/alloc.c b/src/alloc.c
index d1d6323f905..1c793c985eb 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -280,6 +280,9 @@ static void gc_sweep (void);
 static void mark_glyph_matrix (struct glyph_matrix *);
 static void mark_face_cache (struct face_cache *);
 
+#if !defined REL_ALLOC || defined SYSTEM_MALLOC
+static void refill_memory_reserve (void);
+#endif
 static struct Lisp_String *allocate_string (void);
 static void compact_small_strings (void);
 static void free_large_strings (void);