diff --git a/Gems/ImGui/External/ImGui/v1.82/imgui/imgui_widgets.cpp b/Gems/ImGui/External/ImGui/v1.82/imgui/imgui_widgets.cpp
index 706de2918d..86381358fa 100644
--- a/Gems/ImGui/External/ImGui/v1.82/imgui/imgui_widgets.cpp
+++ b/Gems/ImGui/External/ImGui/v1.82/imgui/imgui_widgets.cpp
@@ -2080,8 +2080,9 @@ static const char* ImAtoi(const char* src, TYPE* output)
 // Sanitize format
 // - Zero terminate so extra characters after format (e.g. "%f123") don't confuse atof/atoi
 // - stb_sprintf.h supports several new modifiers which format numbers in a way that also makes them incompatible atof/atoi.
-static void SanitizeFormatString(const char* fmt, char* fmt_out, [[maybe_unused]] size_t fmt_out_size)
+static void SanitizeFormatString(const char* fmt, char* fmt_out, size_t fmt_out_size)
 {
+    IM_UNUSED(fmt_out_size);
     const char* fmt_end = ImParseFormatFindEnd(fmt);
     IM_ASSERT((size_t)(fmt_end - fmt + 1) < fmt_out_size); // Format is too long, let us know if this happens to you!
     while (fmt < fmt_end)