diff --git a/src/lib-mem.c b/src/lib-mem.c
index 86f7e40..8c78b59 100644
--- a/src/lib-mem.c
+++ b/src/lib-mem.c
@@ -102,6 +102,13 @@ static int dummy_offset = 0;
 #define DUMMY_START ((uintptr_t)dummy_buffer)
 #define DUMMY_STOP ((uintptr_t)dummy_buffer + DUMMY_BYTES)
 
+void _zz_mem_init(void)
+{
+    LOADSYM(calloc);
+    LOADSYM(malloc);
+    LOADSYM(realloc);
+}
+
 void *NEW(calloc)(size_t nmemb, size_t size)
 {
     void *ret;
@@ -144,7 +151,8 @@ void NEW(free)(void *ptr)
 void *NEW(realloc)(void *ptr, size_t size)
 {
     void *ret;
-    if((uintptr_t)ptr >= DUMMY_START && (uintptr_t)ptr < DUMMY_STOP)
+    if(!ORIG(realloc)
+        || ((uintptr_t)ptr >= DUMMY_START && (uintptr_t)ptr < DUMMY_STOP))
     {
         ret = dummy_buffer + dummy_offset;
         memcpy(ret, ptr, size);
diff --git a/src/libzzuf.c b/src/libzzuf.c
index 37256de..d0bc3f7 100644
--- a/src/libzzuf.c
+++ b/src/libzzuf.c
@@ -111,6 +111,7 @@ void _zz_init(void)
         _zz_network = 1;
 
     _zz_fd_init();
+    _zz_mem_init();
     _zz_sys_init();
 
     tmp = getenv("ZZUF_STDIN");
diff --git a/src/libzzuf.h b/src/libzzuf.h
index 8dc6a80..ef0fd55 100644
--- a/src/libzzuf.h
+++ b/src/libzzuf.h
@@ -53,3 +53,6 @@ extern int _zz_memory;
 extern int _zz_network;
 extern int _zz_autoinc;
 
+/* This function is needed to initialise memory functions */
+extern void _zz_mem_init(void);
+