diff --git a/library/dhm.c b/library/dhm.c
index fb7826a..491b763 100644
--- a/library/dhm.c
+++ b/library/dhm.c
@@ -505,7 +505,7 @@
     *n = (size_t) size;
 
     if( *n + 1 == 0 ||
-        ( *buf = (unsigned char *) polarssl_malloc( *n + 1 ) ) == NULL )
+        ( *buf = polarssl_malloc( *n + 1 ) ) == NULL )
     {
         fclose( f );
         return( POLARSSL_ERR_DHM_MALLOC_FAILED );