diff --git a/src/dynarmic/src/dynarmic/backend/arm64/reg_alloc.h b/src/dynarmic/src/dynarmic/backend/arm64/reg_alloc.h
index 8327406a99..ea47f1c897 100644
--- a/src/dynarmic/src/dynarmic/backend/arm64/reg_alloc.h
+++ b/src/dynarmic/src/dynarmic/backend/arm64/reg_alloc.h
@@ -333,7 +333,7 @@ private:
 
     mutable std::mt19937 rand_gen;
 
-    size_t defined_insts_count;
+    size_t defined_insts_count = 0;
 };
 
 template<typename T>