diff --git a/src/m_menu.c b/src/m_menu.c
index 7646e6322..53355c371 100644
--- a/src/m_menu.c
+++ b/src/m_menu.c
@@ -77,7 +77,7 @@
 #include "m_random.h"
 
 #if defined(HAVE_SDL)
-#include "SDL.h"
+#include <SDL.h>
 #if SDL_VERSION_ATLEAST(2,0,0)
 #include "sdl/sdlmain.h" // JOYSTICK_HOTPLUG
 #endif
diff --git a/src/sdl/SDL_main/SDL_windows_main.c b/src/sdl/SDL_main/SDL_windows_main.c
index f73ef30fc..83859087a 100644
--- a/src/sdl/SDL_main/SDL_windows_main.c
+++ b/src/sdl/SDL_main/SDL_windows_main.c
@@ -10,7 +10,7 @@
 #include <windows.h>
 
 /* Include the SDL main definition header */
-#include "SDL.h"
+#include <SDL.h>
 #include "SDL_main.h"
 
 #ifdef main
diff --git a/src/sdl/hwsym_sdl.c b/src/sdl/hwsym_sdl.c
index 0baf05e86..ff4f9f664 100644
--- a/src/sdl/hwsym_sdl.c
+++ b/src/sdl/hwsym_sdl.c
@@ -31,7 +31,7 @@
 
 #ifdef HAVE_SDL
 
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef _MSC_VER
 #pragma warning(default : 4214 4244)
diff --git a/src/sdl/i_main.c b/src/sdl/i_main.c
index 5b205503e..eaaad76fa 100644
--- a/src/sdl/i_main.c
+++ b/src/sdl/i_main.c
@@ -36,7 +36,7 @@
 #ifdef HAVE_SDL
 
 #ifdef HAVE_TTF
-#include "SDL.h"
+#include <SDL.h>
 #include "i_ttf.h"
 #endif
 
diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index 7e04745dd..e03bf6993 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -64,7 +64,7 @@ typedef LPVOID (WINAPI *p_MapViewOfFile) (HANDLE, DWORD, DWORD, DWORD, SIZE_T);
 
 #ifdef HAVE_SDL
 #define _MATH_DEFINES_DEFINED
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef HAVE_TTF
 #include "i_ttf.h"
diff --git a/src/sdl/i_ttf.c b/src/sdl/i_ttf.c
index f2cd497ee..c6a98efa8 100644
--- a/src/sdl/i_ttf.c
+++ b/src/sdl/i_ttf.c
@@ -17,7 +17,7 @@
 /// \brief SDL_ttf interface code. Necessary for platforms with no framebuffer console systems.
 
 #if defined(HAVE_SDL) && defined(HAVE_TTF)
-#include "SDL.h"
+#include <SDL.h>
 #include "SDL_ttf.h"
 #include "../doomdef.h"
 #include "../doomstat.h"
diff --git a/src/sdl/i_video.c b/src/sdl/i_video.c
index ab02eb6d5..2eb773ada 100644
--- a/src/sdl/i_video.c
+++ b/src/sdl/i_video.c
@@ -30,7 +30,7 @@
 
 #ifdef HAVE_SDL
 #define _MATH_DEFINES_DEFINED
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef _MSC_VER
 #include <windows.h>
diff --git a/src/sdl/mixer_sound.c b/src/sdl/mixer_sound.c
index d50bb49b5..38513abab 100644
--- a/src/sdl/mixer_sound.c
+++ b/src/sdl/mixer_sound.c
@@ -50,7 +50,7 @@ write netcode into the sound code, OKAY?
 #ifdef _MSC_VER
 #pragma warning(disable : 4214 4244)
 #endif
-#include "SDL.h"
+#include <SDL.h>
 #ifdef _MSC_VER
 #pragma warning(default : 4214 4244)
 #endif
diff --git a/src/sdl/ogl_sdl.c b/src/sdl/ogl_sdl.c
index 39a885f9e..5e088073f 100644
--- a/src/sdl/ogl_sdl.c
+++ b/src/sdl/ogl_sdl.c
@@ -25,7 +25,7 @@
 #ifdef HAVE_SDL
 #define _MATH_DEFINES_DEFINED
 
-#include "SDL.h"
+#include <SDL.h>
 
 #include "sdlmain.h"
 
diff --git a/src/sdl/sdl_sound.c b/src/sdl/sdl_sound.c
index ac7a35167..3b05bfa26 100644
--- a/src/sdl/sdl_sound.c
+++ b/src/sdl/sdl_sound.c
@@ -26,7 +26,7 @@
 
 #if defined(HAVE_SDL) && SOUND==SOUND_SDL
 
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef _MSC_VER
 #pragma warning(default : 4214 4244)
diff --git a/src/sdl12/hwsym_sdl.c b/src/sdl12/hwsym_sdl.c
index b6f6313f6..450d849ab 100644
--- a/src/sdl12/hwsym_sdl.c
+++ b/src/sdl12/hwsym_sdl.c
@@ -31,7 +31,7 @@
 
 #ifdef HAVE_SDL
 
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef _MSC_VER
 #pragma warning(default : 4214 4244)
diff --git a/src/sdl12/i_main.c b/src/sdl12/i_main.c
index bd66bc103..7817196bd 100644
--- a/src/sdl12/i_main.c
+++ b/src/sdl12/i_main.c
@@ -51,7 +51,7 @@ PSP_MAIN_THREAD_STACK_SIZE_KB(256);
 #ifdef HAVE_SDL
 
 #ifdef HAVE_TTF
-#include "SDL.h"
+#include <SDL.h>
 #include "i_ttf.h"
 #endif
 
diff --git a/src/sdl12/i_system.c b/src/sdl12/i_system.c
index 2c41df3ec..a5a950cfb 100644
--- a/src/sdl12/i_system.c
+++ b/src/sdl12/i_system.c
@@ -75,7 +75,7 @@ void __set_fpscr(long); // in libgcc / kernel's startup.s?
 
 #ifdef HAVE_SDL
 
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef HAVE_TTF
 #include "i_ttf.h"
diff --git a/src/sdl12/i_video.c b/src/sdl12/i_video.c
index 45ce67cf5..0662e63cb 100644
--- a/src/sdl12/i_video.c
+++ b/src/sdl12/i_video.c
@@ -29,7 +29,7 @@
 
 #ifdef HAVE_SDL
 
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef _MSC_VER
 #pragma warning(default : 4214 4244)
diff --git a/src/sdl12/sdl_sound.c b/src/sdl12/sdl_sound.c
index 3f2484a9d..a0123d46f 100644
--- a/src/sdl12/sdl_sound.c
+++ b/src/sdl12/sdl_sound.c
@@ -25,7 +25,7 @@
 
 #if defined(HAVE_SDL) && SOUND==SOUND_SDL
 
-#include "SDL.h"
+#include <SDL.h>
 
 #ifdef _MSC_VER
 #pragma warning(default : 4214 4244)