diff --git a/plugins/win-capture/game-capture.c b/plugins/win-capture/game-capture.c
index 248ead5b2..a47f4912e 100644
--- a/plugins/win-capture/game-capture.c
+++ b/plugins/win-capture/game-capture.c
@@ -1251,8 +1251,13 @@ static inline enum capture_result init_capture_data(struct game_capture *gc)
 
 	CloseHandle(gc->hook_data_map);
 
-	gc->hook_data_map = open_map_plus_id(gc, SHMEM_TEXTURE,
-					     gc->global_hook_info->map_id);
+	wchar_t name[64];
+	_snwprintf(name, 64, L"%s_%d_", SHMEM_TEXTURE,
+		   (uint32_t)(uintptr_t)gc->window);
+
+	gc->hook_data_map =
+		open_map_plus_id(gc, name, gc->global_hook_info->map_id);
+
 	if (!gc->hook_data_map) {
 		DWORD error = GetLastError();
 		if (error == 2) {
diff --git a/plugins/win-capture/graphics-hook/graphics-hook.c b/plugins/win-capture/graphics-hook/graphics-hook.c
index c52047ea1..d939d8afd 100644
--- a/plugins/win-capture/graphics-hook/graphics-hook.c
+++ b/plugins/win-capture/graphics-hook/graphics-hook.c
@@ -490,10 +490,11 @@ static inline void unlock_shmem_tex(int id)
 	}
 }
 
-static inline bool init_shared_info(size_t size)
+static inline bool init_shared_info(size_t size, HWND window)
 {
 	wchar_t name[64];
-	_snwprintf(name, 64, L"%s%u", SHMEM_TEXTURE, ++shmem_id_counter);
+	_snwprintf(name, 64, L"%s_%d_%u", SHMEM_TEXTURE,
+		   (uint32_t)(uintptr_t)window, ++shmem_id_counter);
 
 	shmem_file_handle = CreateFileMappingW(INVALID_HANDLE_VALUE, NULL,
 					       PAGE_READWRITE, 0, (DWORD)size,
@@ -519,7 +520,7 @@ bool capture_init_shtex(struct shtex_data **data, HWND window, uint32_t base_cx,
 			uint32_t base_cy, uint32_t cx, uint32_t cy,
 			uint32_t format, bool flip, uintptr_t handle)
 {
-	if (!init_shared_info(sizeof(struct shtex_data))) {
+	if (!init_shared_info(sizeof(struct shtex_data), window)) {
 		hlog("capture_init_shtex: Failed to initialize memory");
 		return false;
 	}
@@ -700,7 +701,7 @@ bool capture_init_shmem(struct shmem_data **data, HWND window, uint32_t base_cx,
 	uint32_t total_size = aligned_header + aligned_tex * 2 + 32;
 	uintptr_t align_pos;
 
-	if (!init_shared_info(total_size)) {
+	if (!init_shared_info(total_size, window)) {
 		hlog("capture_init_shmem: Failed to initialize memory");
 		return false;
 	}