diff --git a/include/mbedtls/md4.h b/include/mbedtls/md4.h
index a2ab57f..23fa95e 100644
--- a/include/mbedtls/md4.h
+++ b/include/mbedtls/md4.h
@@ -40,11 +40,6 @@
 
 #define MBEDTLS_ERR_MD4_HW_ACCEL_FAILED                   -0x002D  /**< MD4 hardware accelerator failed */
 
-#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
-    !defined(inline) && !defined(__cplusplus)
-#define inline __inline
-#endif
-
 #if !defined(MBEDTLS_MD4_ALT)
 // Regular implementation
 //
@@ -188,11 +183,7 @@
  *                 stronger message digests instead.
  *
  */
-MBEDTLS_DEPRECATED static inline void mbedtls_md4_starts(
-                                                    mbedtls_md4_context *ctx )
-{
-    mbedtls_md4_starts_ret( ctx );
-}
+MBEDTLS_DEPRECATED void mbedtls_md4_starts( mbedtls_md4_context *ctx );
 
 /**
  * \brief          MD4 process buffer
@@ -208,13 +199,9 @@
  *                 stronger message digests instead.
  *
  */
-MBEDTLS_DEPRECATED static inline void mbedtls_md4_update(
-                                                    mbedtls_md4_context *ctx,
-                                                    const unsigned char *input,
-                                                    size_t ilen )
-{
-    mbedtls_md4_update_ret( ctx, input, ilen );
-}
+MBEDTLS_DEPRECATED void mbedtls_md4_update( mbedtls_md4_context *ctx,
+                                            const unsigned char *input,
+                                            size_t ilen );
 
 /**
  * \brief          MD4 final digest
@@ -229,12 +216,8 @@
  *                 stronger message digests instead.
  *
  */
-MBEDTLS_DEPRECATED static inline void mbedtls_md4_finish(
-                                                    mbedtls_md4_context *ctx,
-                                                    unsigned char output[16] )
-{
-    mbedtls_md4_finish_ret( ctx, output );
-}
+MBEDTLS_DEPRECATED void mbedtls_md4_finish( mbedtls_md4_context *ctx,
+                                            unsigned char output[16] );
 
 /**
  * \brief          MD4 process data block (internal use only)
@@ -249,12 +232,8 @@
  *                 stronger message digests instead.
  *
  */
-MBEDTLS_DEPRECATED static inline void mbedtls_md4_process(
-                                                mbedtls_md4_context *ctx,
-                                                const unsigned char data[64] )
-{
-    mbedtls_internal_md4_process( ctx, data );
-}
+MBEDTLS_DEPRECATED void mbedtls_md4_process( mbedtls_md4_context *ctx,
+                                             const unsigned char data[64] );
 
 #undef MBEDTLS_DEPRECATED
 #endif /* !MBEDTLS_DEPRECATED_REMOVED */
@@ -309,12 +288,9 @@
  *                 stronger message digests instead.
  *
  */
-MBEDTLS_DEPRECATED static inline void mbedtls_md4( const unsigned char *input,
-                                                   size_t ilen,
-                                                   unsigned char output[16] )
-{
-    mbedtls_md4_ret( input, ilen, output );
-}
+MBEDTLS_DEPRECATED void mbedtls_md4( const unsigned char *input,
+                                     size_t ilen,
+                                     unsigned char output[16] );
 
 #undef MBEDTLS_DEPRECATED
 #endif /* !MBEDTLS_DEPRECATED_REMOVED */