diff --git a/src/memory_pool.c b/src/memory_pool.c
index 87816cd7e..ea288c533 100644
--- a/src/memory_pool.c
+++ b/src/memory_pool.c
@@ -45,7 +45,9 @@
  */
 
 #include <btstack/memory_pool.h>
+
 #include <stddef.h>
+#include "debug.h"
 
 typedef struct node {
     struct node * next;
@@ -79,6 +81,16 @@ void * memory_pool_get(memory_pool_t *pool){
 void memory_pool_free(memory_pool_t *pool, void * block){
     node_t *free_blocks = (node_t*) pool;
     node_t *node        = (node_t*) block;
+
+    // raise error and abort if node already in list
+    node_t * it;
+    for (it = free_blocks->next; it ; it = it->next){
+        if (it == node) {
+            log_error("memory_pool_free: block %p freed twice for pool %p", block, pool);
+            return;
+        }
+    }
+
     // add block as node to list
     node->next          = free_blocks->next;
     free_blocks->next   = node;