diff --git a/AMSS_NCKU_source/bssnEScalar_class.C b/AMSS_NCKU_source/bssnEScalar_class.C
index 48ab025..8de5829 100644
--- a/AMSS_NCKU_source/bssnEScalar_class.C
+++ b/AMSS_NCKU_source/bssnEScalar_class.C
@@ -194,7 +194,7 @@ bool bssn_escalar_cuda_bh_interp_resident_enabled()
   if (enabled < 0)
   {
     const char *env = getenv("AMSS_CUDA_BH_INTERP_RESIDENT");
-    enabled = env ? ((atoi(env) != 0) ? 1 : 0) : 0;
+    enabled = env ? ((atoi(env) != 0) ? 1 : 0) : 1;
   }
   return enabled != 0;
 }
diff --git a/AMSS_NCKU_source/bssn_class.C b/AMSS_NCKU_source/bssn_class.C
index 2f1bef1..e70584e 100644
--- a/AMSS_NCKU_source/bssn_class.C
+++ b/AMSS_NCKU_source/bssn_class.C
@@ -1058,7 +1058,7 @@ bool bssn_cuda_bh_interp_resident_enabled()
     if (env)
       enabled = (atoi(env) != 0) ? 1 : 0;
     else
-      enabled = 0;
+      enabled = 1;
   }
   return enabled != 0;
 }