diff --git a/library/poly1305.c b/library/poly1305.c
index 7375a0c57..f0d4cb63f 100644
--- a/library/poly1305.c
+++ b/library/poly1305.c
@@ -44,12 +44,6 @@
 #define inline __inline
 #endif
 
-/* Parameter validation macros */
-#define POLY1305_VALIDATE_RET( cond )                                       \
-    MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA )
-#define POLY1305_VALIDATE( cond )                                           \
-    MBEDTLS_INTERNAL_VALIDATE( cond )
-
 #define POLY1305_BLOCK_SIZE_BYTES ( 16U )
 
 /*
@@ -258,8 +252,6 @@ static void poly1305_compute_mac( const mbedtls_poly1305_context *ctx,
 
 void mbedtls_poly1305_init( mbedtls_poly1305_context *ctx )
 {
-    POLY1305_VALIDATE( ctx != NULL );
-
     mbedtls_platform_zeroize( ctx, sizeof( mbedtls_poly1305_context ) );
 }
 
@@ -274,9 +266,6 @@ void mbedtls_poly1305_free( mbedtls_poly1305_context *ctx )
 int mbedtls_poly1305_starts( mbedtls_poly1305_context *ctx,
                              const unsigned char key[32] )
 {
-    POLY1305_VALIDATE_RET( ctx != NULL );
-    POLY1305_VALIDATE_RET( key != NULL );
-
     /* r &= 0x0ffffffc0ffffffc0ffffffc0fffffff */
     ctx->r[0] = MBEDTLS_GET_UINT32_LE( key, 0 )  & 0x0FFFFFFFU;
     ctx->r[1] = MBEDTLS_GET_UINT32_LE( key, 4 )  & 0x0FFFFFFCU;
@@ -310,8 +299,6 @@ int mbedtls_poly1305_update( mbedtls_poly1305_context *ctx,
     size_t remaining = ilen;
     size_t queue_free_len;
     size_t nblocks;
-    POLY1305_VALIDATE_RET( ctx != NULL );
-    POLY1305_VALIDATE_RET( ilen == 0 || input != NULL );
 
     if( ( remaining > 0U ) && ( ctx->queue_len > 0U ) )
     {
@@ -369,9 +356,6 @@ int mbedtls_poly1305_update( mbedtls_poly1305_context *ctx,
 int mbedtls_poly1305_finish( mbedtls_poly1305_context *ctx,
                              unsigned char mac[16] )
 {
-    POLY1305_VALIDATE_RET( ctx != NULL );
-    POLY1305_VALIDATE_RET( mac != NULL );
-
     /* Process any leftover data */
     if( ctx->queue_len > 0U )
     {
@@ -400,9 +384,6 @@ int mbedtls_poly1305_mac( const unsigned char key[32],
 {
     mbedtls_poly1305_context ctx;
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    POLY1305_VALIDATE_RET( key != NULL );
-    POLY1305_VALIDATE_RET( mac != NULL );
-    POLY1305_VALIDATE_RET( ilen == 0 || input != NULL );
 
     mbedtls_poly1305_init( &ctx );