diff --git a/scripts/ecp_comb_table.py b/scripts/ecp_comb_table.py
index bc11431..6719be1 100755
--- a/scripts/ecp_comb_table.py
+++ b/scripts/ecp_comb_table.py
@@ -126,7 +126,7 @@
     }
     if ( grp.T == NULL ) {
         fprintf( stderr, "grp.T is not generated. Please make sure"
-                         "MBEDTLS_ECP_FIXED_POINT_OPTIM is enabled in config.h\n" );
+                         "MBEDTLS_ECP_FIXED_POINT_OPTIM is enabled in mbedtls_config.h\n" );
         return 1;
     }
     dump_T( &grp );