diff --git a/library/x509_csr.c b/library/x509_csr.c
index a6fe581..082fed1 100644
--- a/library/x509_csr.c
+++ b/library/x509_csr.c
@@ -110,7 +110,7 @@
     /*
      * first copy the raw DER data
      */
-    p = (unsigned char *) polarssl_malloc( len = buflen );
+    p = polarssl_malloc( len = buflen );
 
     if( p == NULL )
         return( POLARSSL_ERR_X509_MALLOC_FAILED );