diff --git a/runtime/starpu/codelets/codelet_gemmex.c b/runtime/starpu/codelets/codelet_gemmex.c
index cf99b426e0e3bb018ccd879848f7584f49e4c8d0..a7a76caaf5cbf003412b86e4f6ced8afbc37e084 100644
--- a/runtime/starpu/codelets/codelet_gemmex.c
+++ b/runtime/starpu/codelets/codelet_gemmex.c
@@ -133,7 +133,7 @@ void INSERT_TASK_gemmex_Astat( const RUNTIME_option_t *options,
     void (*callback)(void*);
     int                      accessC;
     int                      exec    = 0;
-    char                    *cl_name = "gemmex_Astat";
+    const char              *cl_name = "gemmex_Astat";
 
     /* Handle cache */
     CHAMELEON_BEGIN_ACCESS_DECLARATION;
@@ -216,7 +216,7 @@ void INSERT_TASK_gemmex( const RUNTIME_option_t *options,
     void (*callback)(void*);
     int                      accessC;
     int                      exec = 0;
-    char                    *cl_name = "gemmex";
+    const char              *cl_name = "gemmex";
 
     if ( !(options->withcuda) ) {
         /* Fallback to cpu version */