diff --git a/src/client/component/slowmotion.cpp b/src/client/component/slowmotion.cpp
index d688083..3a0e1b5 100644
--- a/src/client/component/slowmotion.cpp
+++ b/src/client/component/slowmotion.cpp
@@ -2,6 +2,9 @@
 #include "loader/component_loader.hpp"
 #include "game/game.hpp"
 
+#include "command.hpp"
+#include "console.hpp"
+
 #include <utils/hook.hpp>
 #include <utils/string.hpp>
 
@@ -54,6 +57,25 @@ namespace slowmotion
 				client->nextSnapshotTime = *game::mp::serverTime - 1;
 			}
 		}
+
+		void set_code_time_scale(float timescale)
+		{
+			assert(timescale > 0.0f);
+			*game::com_codeTimeScale = timescale;
+		}
+
+		void com_timescale_f(const command::params& params)
+		{
+			if (params.size() != 2)
+			{
+				console::info("timescale <rate>\n");
+				return;
+			}
+
+			const auto timescale = static_cast<float>(std::atof(params.get(1)));
+			console::info("timescale set to %f\n", timescale);
+			set_code_time_scale(timescale);
+		}
 	}
 
 	class component final : public component_interface
@@ -61,7 +83,17 @@ namespace slowmotion
 	public:
 		void post_unpack() override
 		{
-			if (!game::environment::is_dedi()) return;
+			if (game::environment::is_sp())
+			{
+				return;
+			}
+
+			command::add("timescale", com_timescale_f);
+
+			if (!game::environment::is_dedi())
+			{
+				return;
+			}
 
 			utils::hook::jump(0x1403B4A10, scr_cmd_set_slow_motion);
 
diff --git a/src/client/game/symbols.hpp b/src/client/game/symbols.hpp
index 14a7a4e..af98092 100644
--- a/src/client/game/symbols.hpp
+++ b/src/client/game/symbols.hpp
@@ -308,6 +308,8 @@ namespace game
 
 	WEAK symbol<DB_LoadData> g_load{0x1418CF4A0, 0x141EEFBA0};
 
+	WEAK symbol<float> com_codeTimeScale{0x0, 0x1445CEF84};
+
 	WEAK symbol<WinVars_t> g_wv{0x145A7BAD0, 0x147AD2630};
 	WEAK symbol<WinMouseVars_t> s_wmv{0x145A73750, 0x147AC9D78};
 
diff --git a/src/common/utils/string.hpp b/src/common/utils/string.hpp
index 75a8117..b5f49ae 100644
--- a/src/common/utils/string.hpp
+++ b/src/common/utils/string.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include "memory.hpp"
+#include <cstdarg>
 #include <cstdint>
 
 template <class Type, size_t n>
@@ -29,7 +30,12 @@ namespace utils::string
 
 			while (true)
 			{
-				const auto res = vsnprintf_s(entry->buffer_, entry->size_, _TRUNCATE, format, ap);
+				va_list ap_copy;
+				va_copy(ap_copy, ap);
+
+				const auto res = vsnprintf_s(entry->buffer_, entry->size_, _TRUNCATE, format, ap_copy);
+				va_end(ap_copy);
+
 				if (res > 0) break; // Success
 				if (res == 0) return nullptr; // Error