diff --git a/arch/xtensa/src/esp32/esp32_wifi_adapter.c b/arch/xtensa/src/esp32/esp32_wifi_adapter.c
index 2348d2a8cec..56832837e01 100644
--- a/arch/xtensa/src/esp32/esp32_wifi_adapter.c
+++ b/arch/xtensa/src/esp32/esp32_wifi_adapter.c
@@ -3645,7 +3645,7 @@ static void *esp_realloc_internal(void *ptr, size_t size)
           return NULL;
         }
 
-      old_size = malloc_usable_size(old_ptr);
+      old_size = malloc_size(old_ptr);
       DEBUGASSERT(old_size > 0);
       memcpy(new_ptr, old_ptr, MIN(old_size, size));
       kmm_free(old_ptr);
diff --git a/include/malloc.h b/include/malloc.h
index a4bc6c4f43c..ddfa96f9dec 100644
--- a/include/malloc.h
+++ b/include/malloc.h
@@ -31,6 +31,8 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#define malloc_usable_size malloc_size
+
 /****************************************************************************
  * Public Type Definitions
  ****************************************************************************/
@@ -58,7 +60,7 @@ extern "C"
 #endif
 
 struct mallinfo mallinfo(void);
-size_t malloc_usable_size(FAR void *ptr);
+size_t malloc_size(FAR void *ptr);
 
 #if defined(__cplusplus)
 }
diff --git a/mm/mm_heap/Make.defs b/mm/mm_heap/Make.defs
index b44f98862f3..678c52c79eb 100644
--- a/mm/mm_heap/Make.defs
+++ b/mm/mm_heap/Make.defs
@@ -23,9 +23,9 @@
 ifeq ($(CONFIG_MM_DEFAULT_MANAGER),y)
 
 CSRCS += mm_initialize.c mm_sem.c mm_addfreechunk.c mm_size2ndx.c
-CSRCS += mm_malloc_usable_size.c mm_shrinkchunk.c
-CSRCS += mm_brkaddr.c mm_calloc.c mm_extend.c mm_free.c mm_mallinfo.c
-CSRCS += mm_malloc.c mm_memalign.c mm_realloc.c mm_zalloc.c mm_heapmember.c
+CSRCS += mm_malloc_size.c mm_shrinkchunk.c mm_brkaddr.c mm_calloc.c
+CSRCS += mm_extend.c mm_free.c mm_mallinfo.c mm_malloc.c
+CSRCS += mm_memalign.c mm_realloc.c mm_zalloc.c mm_heapmember.c
 
 ifeq ($(CONFIG_BUILD_KERNEL),y)
 CSRCS += mm_sbrk.c
diff --git a/mm/mm_heap/mm_malloc_usable_size.c b/mm/mm_heap/mm_malloc_size.c
similarity index 95%
rename from mm/mm_heap/mm_malloc_usable_size.c
rename to mm/mm_heap/mm_malloc_size.c
index b4df7173418..40bc7b2622a 100644
--- a/mm/mm_heap/mm_malloc_usable_size.c
+++ b/mm/mm_heap/mm_malloc_size.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * mm/mm_heap/mm_malloc_usable_size.c
+ * mm/mm_heap/mm_malloc_size.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
@@ -36,7 +36,7 @@
  * Public Functions
  ****************************************************************************/
 
-size_t malloc_usable_size(FAR void *mem)
+size_t malloc_size(FAR void *mem)
 {
   FAR struct mm_freenode_s *node;
 
diff --git a/mm/tlsf/mm_tlsf.c b/mm/tlsf/mm_tlsf.c
index a451cde9941..774368130cd 100644
--- a/mm/tlsf/mm_tlsf.c
+++ b/mm/tlsf/mm_tlsf.c
@@ -855,10 +855,10 @@ int mm_mallinfo(FAR struct mm_heap_s *heap, FAR struct mallinfo *info)
 }
 
 /****************************************************************************
- * Name: malloc_usable_size
+ * Name: malloc_size
  ****************************************************************************/
 
-size_t malloc_usable_size(FAR void *mem)
+size_t malloc_size(FAR void *mem)
 {
   return tlsf_block_size(mem);
 }