diff --git a/nx/include/switch/services/clkrst.h b/nx/include/switch/services/clkrst.h
index 6bd77eff..7755331f 100644
--- a/nx/include/switch/services/clkrst.h
+++ b/nx/include/switch/services/clkrst.h
@@ -15,7 +15,9 @@ typedef struct {
 
 Result clkrstInitialize(void);
 void clkrstExit(void);
-Result clkrstOpenSession(ClkrstSession* session_out, PcvModule module);
+
+/// Opens a ClkrstSession for the requested PcvModuleId, unk is set to 3 in official sysmodules.
+Result clkrstOpenSession(ClkrstSession* session_out, PcvModuleId module_id, u32 unk);
 void clkrstCloseSession(ClkrstSession* session);
 Result clkrstSetClockRate(ClkrstSession* session, u32 hz);
 Result clkrstGetClockRate(ClkrstSession* session, u32 *out_hz);
diff --git a/nx/source/services/clkrst.c b/nx/source/services/clkrst.c
index 8857e173..5a0a3576 100644
--- a/nx/source/services/clkrst.c
+++ b/nx/source/services/clkrst.c
@@ -37,14 +37,14 @@ void clkrstExit(void) {
     }
 }
 
-Result clkrstOpenSession(ClkrstSession* session_out, PcvModule module) {
+Result clkrstOpenSession(ClkrstSession* session_out, PcvModuleId module_id, u32 unk) {
     IpcCommand c;
     ipcInitialize(&c);
 
     struct {
         u64 magic;
         u64 cmd_id;
-        u32 module;
+        u32 module_id;
         u32 unk;
     } *raw;
 
@@ -52,8 +52,8 @@ Result clkrstOpenSession(ClkrstSession* session_out, PcvModule module) {
 
     raw->magic = SFCI_MAGIC;
     raw->cmd_id = 0;
-    raw->module = 0x40000001 + module;
-    raw->unk = 3;
+    raw->module_id = module_id;
+    raw->unk = unk;
 
     Result rc = serviceIpcDispatch(&g_clkrstSrv);