diff --git a/backends/imgui_impl_sdl2.cpp b/backends/imgui_impl_sdl2.cpp
index 3d82bc348..fa2714bb9 100644
--- a/backends/imgui_impl_sdl2.cpp
+++ b/backends/imgui_impl_sdl2.cpp
@@ -136,7 +136,7 @@ struct ImGui_ImplSDL2_Data
     SDL_Renderer*           Renderer;
     Uint64                  Time;
     char*                   ClipboardTextData;
-    char                    BackendPlatformName[40];
+    char                    BackendPlatformName[48];
 
     // Mouse handling
     Uint32                  MouseWindowID;
diff --git a/backends/imgui_impl_sdl3.cpp b/backends/imgui_impl_sdl3.cpp
index 41511140c..58cc11c44 100644
--- a/backends/imgui_impl_sdl3.cpp
+++ b/backends/imgui_impl_sdl3.cpp
@@ -102,7 +102,7 @@ struct ImGui_ImplSDL3_Data
     SDL_Renderer*           Renderer;
     Uint64                  Time;
     char*                   ClipboardTextData;
-    char                    BackendPlatformName[40];
+    char                    BackendPlatformName[48];
 
     // IME handling
     SDL_Window*             ImeWindow;