diff --git a/src/openrct2/interface/Chat.cpp b/src/openrct2/interface/Chat.cpp
index 4761888887..b6ba76bc6e 100644
--- a/src/openrct2/interface/Chat.cpp
+++ b/src/openrct2/interface/Chat.cpp
@@ -207,6 +207,21 @@ void ChatDraw(DrawPixelInfo& dpi, ColourWithFlags chatBackgroundColor)
     }
 }
 
+/**
+ * strftime wrapper which appends to an existing string.
+ */
+static size_t StrCatFTime(char* buffer, size_t bufferSize, const char* format, const struct tm* tp)
+{
+    size_t stringLen = strnlen(buffer, bufferSize);
+    if (stringLen < bufferSize)
+    {
+        char* dst = buffer + stringLen;
+        size_t dstMaxSize = bufferSize - stringLen;
+        return strftime(dst, dstMaxSize, format, tp);
+    }
+    return 0;
+}
+
 void ChatAddHistory(std::string_view s)
 {
     // Format a timestamp
diff --git a/src/openrct2/util/Util.cpp b/src/openrct2/util/Util.cpp
index d6d24ac6ed..b207a8037c 100644
--- a/src/openrct2/util/Util.cpp
+++ b/src/openrct2/util/Util.cpp
@@ -21,7 +21,6 @@
 #include <cassert>
 #include <cctype>
 #include <cmath>
-#include <ctime>
 #include <random>
 
 /* Case insensitive logical compare */
@@ -191,18 +190,3 @@ uint8_t SoftLight(uint8_t a, uint8_t b)
     }
     return static_cast<uint8_t>(std::clamp(fr, 0.0f, 1.0f) * 255.0f);
 }
-
-/**
- * strftime wrapper which appends to an existing string.
- */
-size_t StrCatFTime(char* buffer, size_t bufferSize, const char* format, const struct tm* tp)
-{
-    size_t stringLen = strnlen(buffer, bufferSize);
-    if (stringLen < bufferSize)
-    {
-        char* dst = buffer + stringLen;
-        size_t dstMaxSize = bufferSize - stringLen;
-        return strftime(dst, dstMaxSize, format, tp);
-    }
-    return 0;
-}
diff --git a/src/openrct2/util/Util.h b/src/openrct2/util/Util.h
index 8f5ff2c063..3a985ed0b5 100644
--- a/src/openrct2/util/Util.h
+++ b/src/openrct2/util/Util.h
@@ -12,8 +12,6 @@
 #include "../core/Money.hpp"
 #include "../core/StringTypes.h"
 
-#include <ctime>
-
 int32_t StrLogicalCmp(char const* a, char const* b);
 char* SafeStrCpy(char* destination, const char* source, size_t num);
 char* SafeStrCat(char* destination, const char* source, size_t size);
@@ -48,8 +46,6 @@ uint8_t Lerp(uint8_t a, uint8_t b, float t);
 float FLerp(float a, float b, float t);
 uint8_t SoftLight(uint8_t a, uint8_t b);
 
-size_t StrCatFTime(char* buffer, size_t bufferSize, const char* format, const struct tm* tp);
-
 template<typename T>
 [[nodiscard]] constexpr uint64_t EnumToFlag(T v)
 {