diff --git a/env_support/cmsis-pack/LVGL.lvgl.pdsc b/env_support/cmsis-pack/LVGL.lvgl.pdsc
index 7c3104373..822ff0052 100644
--- a/env_support/cmsis-pack/LVGL.lvgl.pdsc
+++ b/env_support/cmsis-pack/LVGL.lvgl.pdsc
@@ -317,7 +317,8 @@
                 <!-- src/misc-->
                 <file category="sourceC"            name="src/misc/lv_style_gen.c" />
                 <file category="sourceC"            name="src/misc/lv_fs.c" />
-                <file category="sourceC"            name="src/misc/lv_mem_builtin.c" />
+                <file category="sourceC"            name="src/misc/lv_malloc_builtin.c" />
+                <file category="sourceC"            name="src/misc/lv_memcpy_builtin.c" />
                 <file category="sourceC"            name="src/misc/lv_async.c" />
                 <file category="sourceC"            name="src/misc/lv_txt_ap.c" />
                 <file category="sourceC"            name="src/misc/lv_gc.c" />
diff --git a/src/core/lv_obj.c b/src/core/lv_obj.c
index c867477b9..c266db38a 100644
--- a/src/core/lv_obj.c
+++ b/src/core/lv_obj.c
@@ -32,7 +32,7 @@
 #include "../layouts/grid/lv_grid.h"
 
 #if LV_USE_BUILTIN_MALLOC
-    #include "../misc/lv_mem_builtin.h"
+    #include "../misc/lv_malloc_builtin.h"
 #endif
 #include "../hal/lv_hal.h"
 #include <stdint.h>
diff --git a/src/misc/lv_malloc_builtin.c b/src/misc/lv_malloc_builtin.c
index 40551e5d1..98a3f80d8 100644
--- a/src/misc/lv_malloc_builtin.c
+++ b/src/misc/lv_malloc_builtin.c
@@ -139,128 +139,6 @@ void lv_free_builtin(void * p)
     else cur_used = 0;
 }
 
-/**
- * Same as `memcpy` but optimized for 4 byte operation.
- * @param dst pointer to the destination buffer
- * @param src pointer to the source buffer
- * @param len number of byte to copy
- */
-LV_ATTRIBUTE_FAST_MEM void * lv_memcpy_builtin(void * dst, const void * src, size_t len)
-{
-    uint8_t * d8 = dst;
-    const uint8_t * s8 = src;
-
-    /*Simplify for small memories*/
-    if(len < 16) {
-        while(len) {
-            *d8 = *s8;
-            d8++;
-            s8++;
-            len--;
-        }
-        return dst;
-    }
-
-    lv_uintptr_t d_align = (lv_uintptr_t)d8 & ALIGN_MASK;
-    lv_uintptr_t s_align = (lv_uintptr_t)s8 & ALIGN_MASK;
-
-    /*Byte copy for unaligned memories*/
-    if(s_align != d_align) {
-        while(len > 32) {
-            _REPEAT8(_COPY(d8, s8));
-            _REPEAT8(_COPY(d8, s8));
-            _REPEAT8(_COPY(d8, s8));
-            _REPEAT8(_COPY(d8, s8));
-            len -= 32;
-        }
-        while(len) {
-            _COPY(d8, s8)
-            len--;
-        }
-        return dst;
-    }
-
-    /*Make the memories aligned*/
-    if(d_align) {
-        d_align = ALIGN_MASK + 1 - d_align;
-        while(d_align && len) {
-            _COPY(d8, s8);
-            d_align--;
-            len--;
-        }
-    }
-
-    uint32_t * d32 = (uint32_t *)d8;
-    const uint32_t * s32 = (uint32_t *)s8;
-    while(len > 32) {
-        _REPEAT8(_COPY(d32, s32))
-        len -= 32;
-    }
-
-    d8 = (uint8_t *)d32;
-    s8 = (const uint8_t *)s32;
-    while(len) {
-        _COPY(d8, s8)
-        len--;
-    }
-
-    return dst;
-}
-
-/**
- * Same as `memset` but optimized for 4 byte operation.
- * @param dst pointer to the destination buffer
- * @param v value to set [0..255]
- * @param len number of byte to set
- */
-LV_ATTRIBUTE_FAST_MEM void lv_memset_builtin(void * dst, uint8_t v, size_t len)
-{
-    uint8_t * d8 = (uint8_t *)dst;
-    uintptr_t d_align = (lv_uintptr_t) d8 & ALIGN_MASK;
-
-    /*Make the address aligned*/
-    if(d_align) {
-        d_align = ALIGN_MASK + 1 - d_align;
-        while(d_align && len) {
-            _SET(d8, v);
-            len--;
-            d_align--;
-        }
-    }
-
-    uint32_t v32 = (uint32_t)v + ((uint32_t)v << 8) + ((uint32_t)v << 16) + ((uint32_t)v << 24);
-    uint32_t * d32 = (uint32_t *)d8;
-
-    while(len > 32) {
-        _REPEAT8(_SET(d32, v32));
-        len -= 32;
-    }
-
-    d8 = (uint8_t *)d32;
-    while(len) {
-        _SET(d8, v);
-        len--;
-    }
-}
-
-size_t lv_strlen_builtin(const char * str)
-{
-    size_t i = 0;
-    while(str[i]) i++;
-
-    return i + 1;
-}
-
-size_t lv_strncpy_builtin(char * dst, size_t dest_size, const char * src)
-{
-    size_t i;
-    for(i = 0; i < dest_size - 1 && *src; i++) {
-        dst[i] = src[i];
-    }
-    dst[i] = '\0';
-    return i;
-}
-
 lv_res_t lv_mem_test_builtin(void)
 {
     if(lv_tlsf_check(tlsf)) {
diff --git a/tests/src/lv_test_init.c b/tests/src/lv_test_init.c
index 0c5f626e3..380a2e835 100644
--- a/tests/src/lv_test_init.c
+++ b/tests/src/lv_test_init.c
@@ -2,7 +2,7 @@
 #if LV_BUILD_TEST
 #include "lv_test_init.h"
 #include "lv_test_indev.h"
-#include "../../src/misc/lv_mem_builtin.h"
+#include "../../src/misc/lv_malloc_builtin.h"
 #include <sys/time.h>
 #include <stdio.h>
 #include <stdlib.h>