diff --git a/include/mbedtls/compat-1.3.h b/include/mbedtls/compat-1.3.h
index 9276eae..d19e04a 100644
--- a/include/mbedtls/compat-1.3.h
+++ b/include/mbedtls/compat-1.3.h
@@ -2049,7 +2049,6 @@
 #define hmac_drbg_write_seed_file mbedtls_hmac_drbg_write_seed_file
 #define hr_time mbedtls_timing_hr_time
 #define key_exchange_type_t mbedtls_key_exchange_type_t
-#define m_sleep mbedtls_timing_m_sleep
 #define md mbedtls_md
 #define md2 mbedtls_md2
 #define md2_context mbedtls_md2_context
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 34d0bc2..e6b0cd5 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -183,7 +183,7 @@
  * \def MBEDTLS_TIMING_ALT
  *
  * Uncomment to provide your own alternate implementation for mbedtls_timing_hardclock(),
- * mbedtls_timing_get_timer(), mbedtls_set_alarm() and mbedtls_timing_m_sleep().
+ * mbedtls_timing_get_timer(), mbedtls_set_alarm(), mbedtls_set/get_delay()
  *
  * Only works if you have MBEDTLS_TIMING_C enabled.
  *
diff --git a/include/mbedtls/timing.h b/include/mbedtls/timing.h
index efcc5dc..6598c1a 100644
--- a/include/mbedtls/timing.h
+++ b/include/mbedtls/timing.h
@@ -85,13 +85,6 @@
 void mbedtls_set_alarm( int seconds );
 
 /**
- * \brief          Sleep for a certain amount of time
- *
- * \param milliseconds  delay in milliseconds
- */
-void mbedtls_timing_m_sleep( int milliseconds );
-
-/**
  * \brief          Set a pair of delays to watch
  *                 (See \c mbedtls_timing_get_delay().)
  *