diff --git a/include/villas/sample.h b/include/villas/sample.h
index 58b2f8915..444507462 100644
--- a/include/villas/sample.h
+++ b/include/villas/sample.h
@@ -42,7 +42,7 @@ struct sample {
 	int capacity;		/**< The number of values in sample::values for which memory is reserved. */
 	
 	atomic_int refcnt;	/**< Reference counter. */
-	struct pool *pool;	/**< This sample is belong to this memory pool. */
+	uintptr_t pool_off;	/**< This sample is belong to this memory pool (relative pointer). */
 	struct node *source;	/**< The node from which this sample originates. */
 
 	/** All timestamps are seconds / nano seconds after 1.1.1970 UTC */
@@ -113,4 +113,4 @@ int sample_fprint(FILE *f, struct sample *s, int flags);
  */
 int sample_fscan(FILE *f, struct sample *s, int *flags);
 
-#endif /* _SAMPLE_H_ */
\ No newline at end of file
+#endif /* _SAMPLE_H_ */
diff --git a/lib/sample.c b/lib/sample.c
index e2397f7a2..db6785f5c 100644
--- a/lib/sample.c
+++ b/lib/sample.c
@@ -19,7 +19,7 @@ int sample_alloc(struct pool *p, struct sample *smps[], int cnt) {
 
 	for (int i = 0; i < ret; i++) {
 		smps[i]->capacity = (p->blocksz - sizeof(**smps)) / sizeof(smps[0]->data[0]);
-		smps[i]->pool = p;
+		smps[i]->pool_off = (char *) p - (char *) smps[i];
 	}
 
 	return ret;
@@ -27,8 +27,10 @@ int sample_alloc(struct pool *p, struct sample *smps[], int cnt) {
 
 void sample_free(struct sample *smps[], int cnt)
 {
-	for (int i = 0; i < cnt; i++)
-		pool_put(smps[i]->pool, smps[i]);
+	for (int i = 0; i < cnt; i++) {
+		struct pool *p = (struct pool *) ((char *) smps[i] + smps[i]->pool_off);
+		pool_put(p, smps[i]);
+	}
 }
 
 int sample_get(struct sample *s)
@@ -40,9 +42,11 @@ int sample_put(struct sample *s)
 {
 	int prev = atomic_fetch_sub(&s->refcnt, 1);
 	
-	/* Did we had the last refernce? */
-	if (prev == 1)
-		pool_put(s->pool, s);
+	/* Did we had the last reference? */
+	if (prev == 1) {
+		struct pool *p = (struct pool *) ((char *) s + s->pool_off);
+		pool_put(p, s);
+	}
 	
 	return prev - 1;
 }
@@ -173,4 +177,4 @@ skip:	if (fgets(line, sizeof(line), f) == NULL)
 		goto skip;
 	
 	return sample_scan(line, s, fl);
-}
\ No newline at end of file
+}