diff --git a/Source/Client/ModeScreenshot.cpp b/Source/Client/ModeScreenshot.cpp
new file mode 100644
index 0000000..85eb644
--- /dev/null
+++ b/Source/Client/ModeScreenshot.cpp
@@ -0,0 +1,12 @@
+#include "Client/ModeScreenshot.h"
+
+// OFFSET: 0x00AD63F0
+// FUNCTION: fn_17830
+void SanitizeScreenshotName(std::string& name) {
+  for (std::size_t i = 0; i < name.size(); ++i) {
+    const char c = name[i];
+    if (c == '\\' || c == '/' || c == ':' || c == '*' || c == '?' || c == '"' || c == '<' || c == '>' || c == '|') {
+      name[i] = '_';
+    }
+  }
+}
diff --git a/Source/Client/ModeScreenshot.h b/Source/Client/ModeScreenshot.h
new file mode 100644
index 0000000..71a1250
--- /dev/null
+++ b/Source/Client/ModeScreenshot.h
@@ -0,0 +1,8 @@
+#ifndef RAGNAROK_SOURCE_CLIENT_MODESCREENSHOT_H
+#define RAGNAROK_SOURCE_CLIENT_MODESCREENSHOT_H
+
+#include <string>
+
+void SanitizeScreenshotName(std::string& name);
+
+#endif
diff --git a/data/compile.json b/data/compile.json
index 3e6b785..37a9adf 100644
--- a/data/compile.json
+++ b/data/compile.json
@@ -260,6 +260,7 @@
   "Source/Client/ModeBaseEvents.cpp": 0,
   "Source/Client/ModeFade.cpp": 0,
   "Source/Client/ModeFadeOut.cpp": 0,
+  "Source/Client/ModeScreenshot.cpp": 0,
   "Source/Client/ModeTransitions.cpp": 0,
   "Source/Client/Registry.cpp": 0,
   "Source/Client/Replay.cpp": 0,