diff --git a/library/gcm.c b/library/gcm.c
index 6d07f87..37f07f8 100644
--- a/library/gcm.c
+++ b/library/gcm.c
@@ -63,7 +63,6 @@
  */
 void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
 {
-    GCM_VALIDATE( ctx != NULL );
     memset( ctx, 0, sizeof( mbedtls_gcm_context ) );
 }
 
@@ -143,8 +142,6 @@
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     const mbedtls_cipher_info_t *cipher_info;
 
-    GCM_VALIDATE_RET( ctx != NULL );
-    GCM_VALIDATE_RET( key != NULL );
     GCM_VALIDATE_RET( keybits == 128 || keybits == 192 || keybits == 256 );
 
     cipher_info = mbedtls_cipher_info_from_values( cipher, keybits,
@@ -256,9 +253,6 @@
     size_t use_len, olen = 0;
     uint64_t iv_bits;
 
-    GCM_VALIDATE_RET( ctx != NULL );
-    GCM_VALIDATE_RET( iv != NULL );
-
     /* IV is limited to 2^64 bits, so 2^61 bytes */
     /* IV is not allowed to be zero length */
     if( iv_len == 0 || (uint64_t) iv_len >> 61 != 0 )
@@ -334,8 +328,6 @@
     const unsigned char *p;
     size_t use_len, i, offset;
 
-    GCM_VALIDATE_RET( add_len == 0 || add != NULL );
-
     /* IV is limited to 2^64 bits, so 2^61 bytes */
     if( (uint64_t) add_len >> 61 != 0 )
         return( MBEDTLS_ERR_GCM_BAD_INPUT );
@@ -434,7 +426,6 @@
 
     if( output_size < input_length )
         return( MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL );
-    GCM_VALIDATE_RET( output_length != NULL );
     *output_length = input_length;
 
     /* Exit early if input_length==0 so that we don't do any pointer arithmetic
@@ -444,10 +435,6 @@
     if( input_length == 0 )
         return( 0 );
 
-    GCM_VALIDATE_RET( ctx != NULL );
-    GCM_VALIDATE_RET( input != NULL );
-    GCM_VALIDATE_RET( output != NULL );
-
     if( output > input && (size_t) ( output - input ) < input_length )
         return( MBEDTLS_ERR_GCM_BAD_INPUT );
 
@@ -519,9 +506,6 @@
     uint64_t orig_len;
     uint64_t orig_add_len;
 
-    GCM_VALIDATE_RET( ctx != NULL );
-    GCM_VALIDATE_RET( tag != NULL );
-
     /* We never pass any output in finish(). The output parameter exists only
      * for the sake of alternative implementations. */
     (void) output;
@@ -580,13 +564,6 @@
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t olen;
 
-    GCM_VALIDATE_RET( ctx != NULL );
-    GCM_VALIDATE_RET( iv != NULL );
-    GCM_VALIDATE_RET( add_len == 0 || add != NULL );
-    GCM_VALIDATE_RET( length == 0 || input != NULL );
-    GCM_VALIDATE_RET( length == 0 || output != NULL );
-    GCM_VALIDATE_RET( tag != NULL );
-
     if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len ) ) != 0 )
         return( ret );
 
@@ -619,13 +596,6 @@
     size_t i;
     int diff;
 
-    GCM_VALIDATE_RET( ctx != NULL );
-    GCM_VALIDATE_RET( iv != NULL );
-    GCM_VALIDATE_RET( add_len == 0 || add != NULL );
-    GCM_VALIDATE_RET( tag != NULL );
-    GCM_VALIDATE_RET( length == 0 || input != NULL );
-    GCM_VALIDATE_RET( length == 0 || output != NULL );
-
     if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length,
                                    iv, iv_len, add, add_len,
                                    input, output, tag_len, check_tag ) ) != 0 )