diff --git a/src/kspace.h b/src/kspace.h
index fedc477b81..86e9a29bd2 100644
--- a/src/kspace.h
+++ b/src/kspace.h
@@ -29,6 +29,8 @@ class KSpace : protected Pointers {
     REVERSE_RHO_ARITH,
     REVERSE_RHO_NONE,
     REVERSE_RHO_GPU,
+    REVERSE_RHO_G,
+    REVERSE_RHO_A,
     REVERSE_AD,
     REVERSE_AD_PERATOM,
     REVERSE_MU,
@@ -53,7 +55,15 @@ class KSpace : protected Pointers {
     FORWARD_IK_NONE,
     FORWARD_AD_NONE,
     FORWARD_IK_PERATOM_NONE,
-    FORWARD_AD_PERATOM_NONE
+    FORWARD_AD_PERATOM_NONE,
+    FORWARD_IK_G,
+    FORWARD_AD_G,
+    FORWARD_IK_PERATOM_G,
+    FORWARD_AD_PERATOM_G,
+    FORWARD_IK_A,
+    FORWARD_AD_A,
+    FORWARD_IK_PERATOM_A,
+    FORWARD_AD_PERATOM_A
   };
 
   double energy;    // accumulated energies