diff --git a/library/dhm.c b/library/dhm.c
index 5e510de..82cbb0c 100644
--- a/library/dhm.c
+++ b/library/dhm.c
@@ -36,7 +36,7 @@
 #if defined(MBEDTLS_DHM_C)
 
 #include "mbedtls/dhm.h"
-#include "mbedtls/utils.h"
+#include "mbedtls/platform_util.h"
 
 #include <string.h>
 
@@ -434,7 +434,7 @@
     mbedtls_mpi_free( &ctx->GX ); mbedtls_mpi_free( &ctx->X  );
     mbedtls_mpi_free( &ctx->G  ); mbedtls_mpi_free( &ctx->P  );
 
-    mbedtls_zeroize( ctx, sizeof( mbedtls_dhm_context ) );
+    mbedtls_platform_zeroize( ctx, sizeof( mbedtls_dhm_context ) );
 }
 
 #if defined(MBEDTLS_ASN1_PARSE_C)
@@ -572,7 +572,7 @@
     {
         fclose( f );
 
-        mbedtls_zeroize( *buf, *n + 1 );
+        mbedtls_platform_zeroize( *buf, *n + 1 );
         mbedtls_free( *buf );
 
         return( MBEDTLS_ERR_DHM_FILE_IO_ERROR );
@@ -602,7 +602,7 @@
 
     ret = mbedtls_dhm_parse_dhm( dhm, buf, n );
 
-    mbedtls_zeroize( buf, n );
+    mbedtls_platform_zeroize( buf, n );
     mbedtls_free( buf );
 
     return( ret );