diff --git a/framework/allocator.cpp b/framework/allocator.cpp
index 8f47b0a..d297143 100644
--- a/framework/allocator.cpp
+++ b/framework/allocator.cpp
@@ -52,3 +52,9 @@ void pst_allocator_init_custom(pst_allocator& alloc, void* buff, uint32_t size)
     return;
 }
 
+void pst_alloc_fini(pst_allocator& alloc)
+{
+    alloc.type = ALLOC_NONE;
+    alloc.base = NULL;
+    alloc.size = 0;
+}
diff --git a/framework/allocator.h b/framework/allocator.h
index dbb38a7..46195b4 100644
--- a/framework/allocator.h
+++ b/framework/allocator.h
@@ -18,8 +18,9 @@ typedef void (*pst_free_def)(pst_allocator& alloc, void* buff);
 typedef void* (*pst_realloc_def)(pst_allocator& alloc, void* buff, uint32_t new_size);
 
 typedef enum {
-    ALLOC_HEAP = 1, // use libc memory allocator
-    ALLOC_CUSTOM    // use custom allocator in predefined range of memory
+    ALLOC_NONE = 0,     // not initialized
+    ALLOC_HEAP = 1,     // use libc memory allocator
+    ALLOC_CUSTOM = 2    // use custom allocator in predefined range of memory
 } pst_alloc_type;
 
 typedef struct __pst_allocator {
@@ -34,5 +35,6 @@ typedef struct __pst_allocator {
 
 void pst_alloc_init(pst_allocator& alloc);
 void pst_allocator_init_custom(pst_allocator& alloc, void* buff, uint32_t size);
+void pst_alloc_fini(pst_allocator& alloc);
 
 #endif /* FRAMEWORK_ALLOCATOR_H_ */