diff --git a/src/KKdLib/dsc.cpp b/src/KKdLib/dsc.cpp
index 29928445..9436bba5 100644
--- a/src/KKdLib/dsc.cpp
+++ b/src/KKdLib/dsc.cpp
@@ -3283,6 +3283,15 @@ bool dsc::load_file(void* data, const char* path, const char* file, uint32_t has
     return ret;
 }
 
+dsc& dsc::operator=(const dsc& d) {
+    type = d.type;
+    signature = d.signature;
+    id = d.id;
+    data.assign(d.data.begin(), d.data.end());
+    data_buffer.assign(d.data_buffer.begin(), d.data_buffer.end());
+    return *this;
+}
+
 dsc_replace::dsc_replace(dsc_type src_type, dsc_type dst_type,
     bool dst_has_perf_id) : src_type(DSC_FT), dst_type(DSC_FT), replace_data() {
 
diff --git a/src/KKdLib/dsc.hpp b/src/KKdLib/dsc.hpp
index dfad43b5..56e531f2 100644
--- a/src/KKdLib/dsc.hpp
+++ b/src/KKdLib/dsc.hpp
@@ -309,6 +309,8 @@ struct dsc {
 
     static int32_t calculate_target_flying_time(int32_t bpm, int32_t time_signature);
     static bool load_file(void* data, const char* path, const char* file, uint32_t hash);
+
+    dsc& operator=(const dsc& d);
 };
 
 struct dsc_replace_data {