diff --git a/library/sha1.c b/library/sha1.c
index 8432eba..1f29a0f 100644
--- a/library/sha1.c
+++ b/library/sha1.c
@@ -111,6 +111,13 @@
     return( 0 );
 }
 
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+void mbedtls_sha1_starts( mbedtls_sha1_context *ctx )
+{
+    mbedtls_sha1_starts_ret( ctx );
+}
+#endif
+
 #if !defined(MBEDTLS_SHA1_PROCESS_ALT)
 int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx,
                                    const unsigned char data[64] )
@@ -270,6 +277,14 @@
 
     return( 0 );
 }
+
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+void mbedtls_sha1_process( mbedtls_sha1_context *ctx,
+                           const unsigned char data[64] )
+{
+    mbedtls_internal_sha1_process( ctx, data );
+}
+#endif
 #endif /* !MBEDTLS_SHA1_PROCESS_ALT */
 
 /*
@@ -322,6 +337,15 @@
     return( 0 );
 }
 
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+void mbedtls_sha1_update( mbedtls_sha1_context *ctx,
+                          const unsigned char *input,
+                          size_t ilen )
+{
+    mbedtls_sha1_update_ret( ctx, input, ilen );
+}
+#endif
+
 static const unsigned char sha1_padding[64] =
 {
  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -365,6 +389,14 @@
     return( 0 );
 }
 
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+void mbedtls_sha1_finish( mbedtls_sha1_context *ctx,
+                          unsigned char output[20] )
+{
+    mbedtls_sha1_finish_ret( ctx, output );
+}
+#endif
+
 #endif /* !MBEDTLS_SHA1_ALT */
 
 /*
@@ -394,6 +426,15 @@
     return( ret );
 }
 
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+void mbedtls_sha1( const unsigned char *input,
+                   size_t ilen,
+                   unsigned char output[20] )
+{
+    mbedtls_sha1_ret( input, ilen, output );
+}
+#endif
+
 #if defined(MBEDTLS_SELF_TEST)
 /*
  * FIPS-180-1 test vectors