diff --git a/nx/include/switch/services/mm.h b/nx/include/switch/services/mm.h
index 393f661a..c0e3296d 100644
--- a/nx/include/switch/services/mm.h
+++ b/nx/include/switch/services/mm.h
@@ -25,6 +25,6 @@ Result mmuInitialize(void);
 void mmuExit(void);
 
 Result mmuRequestInitialize(MmuRequest *request, MmuModuleId module, u32 unk, bool autoclear); ///< unk is ignored by official software
-Result mmuRequestFinalize(MmuRequest *request);
-Result mmuRequestGet(MmuRequest *request, u32 *out_freq_hz);
-Result mmuRequestSetAndWait(MmuRequest *request, u32 freq_hz, s32 timeout);
+Result mmuRequestFinalize(const MmuRequest *request);
+Result mmuRequestGet(const MmuRequest *request, u32 *out_freq_hz);
+Result mmuRequestSetAndWait(const MmuRequest *request, u32 freq_hz, s32 timeout);
diff --git a/nx/source/services/mm.c b/nx/source/services/mm.c
index 9993a1ed..286c6204 100644
--- a/nx/source/services/mm.c
+++ b/nx/source/services/mm.c
@@ -32,11 +32,11 @@ Result mmuRequestInitialize(MmuRequest *request, MmuModuleId module, u32 unk, bo
     return rc;
 }
 
-Result mmuRequestFinalize(MmuRequest *request) {
+Result mmuRequestFinalize(const MmuRequest *request) {
     return serviceDispatchIn(&g_mmuSrv, 5, request->id);
 }
 
-Result mmuRequestSetAndWait(MmuRequest *request, u32 freq_hz, s32 timeout) {
+Result mmuRequestSetAndWait(const MmuRequest *request, u32 freq_hz, s32 timeout) {
     struct {
         u32 id;
         u32 freq;
@@ -45,7 +45,7 @@ Result mmuRequestSetAndWait(MmuRequest *request, u32 freq_hz, s32 timeout) {
     return serviceDispatchIn(&g_mmuSrv, 6, data);
 }
 
-Result mmuRequestGet(MmuRequest *request, u32 *out_freq_hz) {
+Result mmuRequestGet(const MmuRequest *request, u32 *out_freq_hz) {
     u32 freq = 0;
     Result rc = serviceDispatchInOut(&g_mmuSrv, 7, request->id, freq);