diff --git a/lib.c b/lib.c
index 14e7076..27b1302 100644
--- a/lib.c
+++ b/lib.c
@@ -1300,6 +1300,7 @@ void ink_gc(struct context* ctx) {
 	int i, j, k;
 	int marked;
 	struct element_slab* v;
+	struct elem* thing;
 	
 	for(i = 0; i < ctx->types_top; ++i) {
 		for(j = 0; j < ctx->types[i].elements_top; ++j) {
@@ -1329,11 +1330,20 @@ void ink_gc(struct context* ctx) {
 			continue;
 		} else for(j = 0; j < ctx->routines[i].top; ++j) {
 			v = ink_get_value_link(ctx, ctx->routines[i].stack[j]);
-			if(v != NULL) ++v->uses;
+			if(v != NULL && !v->uses) ++v->uses;
 		}
 	}
 	
-	/* TODO: Mark objects contained within function code */
+	for(i = 0; i < ctx->native_words_top; ++i) {
+		struct fn* function = ctx->words + i;
+		for(j = 0; j < function->size; ++j) {
+			thing = function->things + j;
+			v = ink_get_value_link(ctx, *thing);
+			if (v != NULL && !v->uses) {
+				++v->uses;
+			}
+		}
+	}
 	
 	/* Mark the rest of the data */
 	do {