diff --git a/src/dp_doom/CMakeLists.txt b/src/dp_doom/CMakeLists.txt
index 2931612..1ec335b 100644
--- a/src/dp_doom/CMakeLists.txt
+++ b/src/dp_doom/CMakeLists.txt
@@ -176,9 +176,9 @@ if(BACKEND STREQUAL "Xlib")
 	target_link_libraries(dp_doom PRIVATE m ${CMAKE_DL_LIBS} pthread)
 elseif(BACKEND STREQUAL "SDL1")
 	target_sources(dp_doom PRIVATE
-		"linuxdoom-1.10/ib_sound/sdl.c"
-		"linuxdoom-1.10/ib_system/sdl.c"
-		"linuxdoom-1.10/ib_video/sdl.c"
+		"linuxdoom-1.10/ib_sound/ib_sound_sdl.c"
+		"linuxdoom-1.10/ib_system/ib_system_sdl.c"
+		"linuxdoom-1.10/ib_video/ib_video_sdl.c"
 	)
 
 	find_package(SDL REQUIRED)
@@ -192,9 +192,9 @@ elseif(BACKEND STREQUAL "SDL1")
 	target_link_libraries(dp_doom PRIVATE SDL::SDL)
 elseif(BACKEND STREQUAL "SDL2")
 	target_sources(dp_doom PRIVATE
-		"linuxdoom-1.10/ib_sound/sdl.c"
-		"linuxdoom-1.10/ib_system/sdl.c"
-		"linuxdoom-1.10/ib_video/sdl.c"
+		"linuxdoom-1.10/ib_sound/ib_sound_sdl.c"
+		"linuxdoom-1.10/ib_system/ib_system_sdl.c"
+		"linuxdoom-1.10/ib_video/ib_video_sdl.c"
 	)
 
 	find_package(SDL2)
@@ -213,8 +213,7 @@ elseif(BACKEND STREQUAL "SDL2")
 	target_compile_definitions(dp_doom PRIVATE INCLUDE_SDL2_MAIN)
 elseif(BACKEND STREQUAL "nng")
 	target_sources(dp_doom PRIVATE
-		#"linuxdoom-1.10/ib_sound/sdl.c"
-		"linuxdoom-1.10/ib_sound/ib_sound_nng.c"
+		"linuxdoom-1.10/ib_sound/ib_sound_sdl.c"
 		"linuxdoom-1.10/ib_system/ib_system_nng.c"
 		"linuxdoom-1.10/ib_video/ib_video_nng.c"
 	)
diff --git a/src/dp_doom/linuxdoom-1.10/ib_sound/sdl.c b/src/dp_doom/linuxdoom-1.10/ib_sound/ib_sound_sdl.c
similarity index 100%
rename from src/dp_doom/linuxdoom-1.10/ib_sound/sdl.c
rename to src/dp_doom/linuxdoom-1.10/ib_sound/ib_sound_sdl.c
diff --git a/src/dp_doom/linuxdoom-1.10/ib_system/sdl.c b/src/dp_doom/linuxdoom-1.10/ib_system/ib_system_sdl.c
similarity index 100%
rename from src/dp_doom/linuxdoom-1.10/ib_system/sdl.c
rename to src/dp_doom/linuxdoom-1.10/ib_system/ib_system_sdl.c
diff --git a/src/dp_doom/linuxdoom-1.10/ib_video/sdl.c b/src/dp_doom/linuxdoom-1.10/ib_video/ib_video_sdl.c
similarity index 100%
rename from src/dp_doom/linuxdoom-1.10/ib_video/sdl.c
rename to src/dp_doom/linuxdoom-1.10/ib_video/ib_video_sdl.c