diff --git a/src/backend_x64/jitstate.cpp b/src/backend_x64/jitstate.cpp
index bc67520b..bb5cfc4c 100644
--- a/src/backend_x64/jitstate.cpp
+++ b/src/backend_x64/jitstate.cpp
@@ -14,7 +14,7 @@
 namespace Dynarmic {
 namespace BackendX64 {
 
-void JitState::ResetRSB(BlockOfCode* code) {
+void JitState::ResetRSB(const BlockOfCode* code) {
     for (auto& value : rsb_codeptrs) {
         value = u64(code->GetReturnFromRunCodeAddress());
     }
diff --git a/src/backend_x64/jitstate.h b/src/backend_x64/jitstate.h
index a03101fa..7df16ea6 100644
--- a/src/backend_x64/jitstate.h
+++ b/src/backend_x64/jitstate.h
@@ -18,7 +18,7 @@ class BlockOfCode;
 constexpr size_t SpillCount = 32;
 
 struct JitState {
-    JitState(BlockOfCode* code) { ResetRSB(code); }
+    explicit JitState(const BlockOfCode* code) { ResetRSB(code); }
 
     u32 Cpsr = 0;
     std::array<u32, 16> Reg{}; // Current register file.
@@ -43,7 +43,7 @@ struct JitState {
     u32 rsb_ptr = 0;
     std::array<u64, RSBSize> rsb_location_descriptors;
     std::array<u64, RSBSize> rsb_codeptrs;
-    void ResetRSB(BlockOfCode* code);
+    void ResetRSB(const BlockOfCode* code);
 
     u32 FPSCR_IDC = 0;
     u32 FPSCR_UFC = 0;