diff --git a/features/mbedtls/mbed_rng.c b/features/mbedtls/mbed_rng.c
index 6417910105..e7237f6469 100644
--- a/features/mbedtls/mbed_rng.c
+++ b/features/mbedtls/mbed_rng.c
@@ -21,7 +21,7 @@
 int mbedtls_hardware_poll( void *data, unsigned char *output, size_t len, size_t *olen ) {
     rng_t rng_obj;
     rng_init(&rng_obj);
-    int ret = rng_get_numbers(&rng_obj, output, len, olen);
+    int ret = rng_get_bytes(&rng_obj, output, len, olen);
     rng_free(&rng_obj);
     return ret;
 }
diff --git a/hal/hal/rng_api.h b/hal/hal/rng_api.h
index f8de514d6a..dd67c50594 100644
--- a/hal/hal/rng_api.h
+++ b/hal/hal/rng_api.h
@@ -54,7 +54,7 @@ void rng_free(rng_t *obj);
  * @param output_length The length of generated data
  * @return 0 success, -1 fail
  */
-int rng_get_numbers(rng_t *obj, uint8_t *output, size_t length, size_t *output_length);
+int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length);
 
 /** Set an external entropy value
  *
diff --git a/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/rng_api.c b/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/rng_api.c
index 7c25673912..397d434032 100644
--- a/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/rng_api.c
+++ b/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/rng_api.c
@@ -56,7 +56,7 @@ static void rng_get_byte(unsigned char *byte)
     }
 }
 
-int rng_get_numbers(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
     size_t i;
     int ret;
diff --git a/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_MCU_K64F/rng_api.c b/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_MCU_K64F/rng_api.c
index 690e0b568e..67404563de 100644
--- a/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_MCU_K64F/rng_api.c
+++ b/hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_MCU_K64F/rng_api.c
@@ -56,7 +56,7 @@ static void rng_get_byte(unsigned char *byte)
     }
 }
 
-int rng_get_numbers(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
     size_t i;
     int ret;
diff --git a/hal/targets/hal/TARGET_NUVOTON/TARGET_NUC472/rng_api.c b/hal/targets/hal/TARGET_NUVOTON/TARGET_NUC472/rng_api.c
index 8a699a5c2e..5885cf147b 100644
--- a/hal/targets/hal/TARGET_NUVOTON/TARGET_NUC472/rng_api.c
+++ b/hal/targets/hal/TARGET_NUVOTON/TARGET_NUC472/rng_api.c
@@ -77,7 +77,7 @@ void rng_free(rng_t *obj)
     //CLK_DisableModuleClock(CRPT_MODULE);
 }
 
-int rng_get_numbers(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
     *output_length = 0;
     if (length < 32) {
diff --git a/hal/targets/hal/TARGET_STM/TARGET_STM32F4/rng_api.c b/hal/targets/hal/TARGET_STM/TARGET_STM32F4/rng_api.c
index 1fbe730be2..357ea89ec4 100644
--- a/hal/targets/hal/TARGET_STM/TARGET_STM32F4/rng_api.c
+++ b/hal/targets/hal/TARGET_STM/TARGET_STM32F4/rng_api.c
@@ -55,7 +55,7 @@ void rng_free(rng_t *obj)
     __HAL_RCC_RNG_CLK_DISABLE();
 }
 
-int rng_get_numbers(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
     int ret;
 
diff --git a/hal/targets/hal/TARGET_STM/TARGET_STM32F7/rng_api.c b/hal/targets/hal/TARGET_STM/TARGET_STM32F7/rng_api.c
index 32edd5f7cf..46c43b3fa2 100644
--- a/hal/targets/hal/TARGET_STM/TARGET_STM32F7/rng_api.c
+++ b/hal/targets/hal/TARGET_STM/TARGET_STM32F7/rng_api.c
@@ -51,7 +51,7 @@ void rng_free(rng_t *obj)
     __HAL_RCC_RNG_CLK_DISABLE();
 }
 
-int rng_get_numbers(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+int rng_get_bytes(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
 {
     int ret;