diff --git a/source/frontends/sdl/imgui/sdlsettings.cpp b/source/frontends/sdl/imgui/sdlsettings.cpp
index b9dfa074..1b779648 100644
--- a/source/frontends/sdl/imgui/sdlsettings.cpp
+++ b/source/frontends/sdl/imgui/sdlsettings.cpp
@@ -915,7 +915,7 @@ namespace sa2
         {
           ImGui::PushID(nAddress);
           DisasmLine_t line;
-          const char* pSymbol = FindSymbolFromAddress(nAddress);
+          std::string const* pSymbol = FindSymbolFromAddress(nAddress);
           const int bDisasmFormatFlags = GetDisassemblyLine(nAddress, line);
 
           ImGui::TableNextRow();
@@ -979,7 +979,7 @@ namespace sa2
           ImGui::TableNextColumn();
           if (pSymbol)
           {
-            debuggerTextColored(FG_DISASM_SYMBOL, pSymbol);
+            debuggerTextColored(FG_DISASM_SYMBOL, pSymbol->c_str());
           }
 
           ImGui::TableNextColumn();
diff --git a/source/linux/duplicates/Joystick.cpp b/source/linux/duplicates/Joystick.cpp
index 388ec801..2716be94 100644
--- a/source/linux/duplicates/Joystick.cpp
+++ b/source/linux/duplicates/Joystick.cpp
@@ -58,8 +58,7 @@ void JoyLoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT version)
   {
     for (UINT n = 0; n < 4; n++)
     {
-      char str[sizeof(SS_YAML_KEY_PDL_INACTIVE_CYCLE) + 1];
-      sprintf_s(str, sizeof(str), SS_YAML_KEY_PDL_INACTIVE_CYCLE, n);
+      const std::string str = StrFormat(SS_YAML_KEY_PDL_INACTIVE_CYCLE, n);
       yamlLoadHelper.LoadUint64(str);
     }
   }
diff --git a/source/linux/libwindows/misc.h b/source/linux/libwindows/misc.h
index ded5963b..a76d7408 100644
--- a/source/linux/libwindows/misc.h
+++ b/source/linux/libwindows/misc.h
@@ -28,6 +28,8 @@
 #define IDYES 6
 #define IDNO 7
 
+#define EINVAL          22
+
 BOOL WINAPI PostMessage(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
 int MessageBox(HWND, const char *, const char *, UINT);
 
diff --git a/source/linux/libwindows/timeapi.h b/source/linux/libwindows/timeapi.h
index a2ee00ac..a110435a 100644
--- a/source/linux/libwindows/timeapi.h
+++ b/source/linux/libwindows/timeapi.h
@@ -4,8 +4,6 @@
 
 #include <ctime>
 
-typedef int errno_t;
-
 #define _tzset tzset
 errno_t ctime_s(char * buf, size_t size, const time_t *time);
 
diff --git a/source/linux/libwindows/wincompat.h b/source/linux/libwindows/wincompat.h
index 71890be1..757cd209 100644
--- a/source/linux/libwindows/wincompat.h
+++ b/source/linux/libwindows/wincompat.h
@@ -206,6 +206,8 @@ typedef void * HWND;
 typedef LONG_PTR LPARAM;
 typedef UINT_PTR WPARAM;
 
+typedef int errno_t;
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/linux/libwindows/winstrings.h b/source/linux/libwindows/winstrings.h
index a38b3a52..1ed567e2 100644
--- a/source/linux/libwindows/winstrings.h
+++ b/source/linux/libwindows/winstrings.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "wincompat.h"
+#include "misc.h"
 
 #include <cstddef>
 #include <ctype.h>
@@ -18,8 +19,6 @@ int vsnprintf_s(
 
 #define _TRUNCATE ((size_t)-1)
 
-#define sprintf_s snprintf
-
 #define _strdup strdup
 #define _strtoui64 strtoull
 #define _vsntprintf vsnprintf
@@ -51,3 +50,34 @@ inline bool IsCharUpper(char ch) {
 DWORD CharLowerBuff(LPTSTR lpsz, DWORD cchLength);
 
 LPSTR _strupr( LPSTR str );
+
+// copied from
+// https://github.com/wine-mirror/wine/blob/1d178982ae5a73b18f367026c8689b56789c39fd/dlls/msvcrt/heap.c#L833
+template <size_t size>
+errno_t strncpy_s(char (&dest)[size], const char *src, size_t count)
+{
+  size_t end;
+  if (count != _TRUNCATE && count < size)
+  {
+    end = count;
+  }
+  else
+  {
+    end = size - 1;
+  }
+
+  size_t i;
+  for (i = 0; i < end && src[i]; i++)
+  {
+    dest[i] = src[i];
+  }
+
+  if (!src[i] || end == count || count == _TRUNCATE)
+  {
+    dest[i] = '\0';
+    return 0;
+  }
+
+  dest[0] = '\0';
+  return EINVAL;
+}