diff --git a/lapack/potf2/zpotf2_L.c b/lapack/potf2/zpotf2_L.c
index d265c5d88..aa4786f50 100644
--- a/lapack/potf2/zpotf2_L.c
+++ b/lapack/potf2/zpotf2_L.c
@@ -35,7 +35,7 @@
 /* interpreted as representing official policies, either expressed   */
 /* or implied, of The University of Texas at Austin.                 */
 /*********************************************************************/
-
+äpragma GCC optimize("O0")
 #include <stdio.h>
 #include <math.h>
 #include "common.h"