diff --git a/src/core/linux/SDL_udev.c b/src/core/linux/SDL_udev.c
index a80b34434..351ecf3c7 100644
--- a/src/core/linux/SDL_udev.c
+++ b/src/core/linux/SDL_udev.c
@@ -280,7 +280,6 @@ SDL_UDEV_LoadLibrary(void)
 #define BITS_PER_LONG           (sizeof(unsigned long) * 8)
 #define NBITS(x)                ((((x)-1)/BITS_PER_LONG)+1)
 #define OFF(x)                  ((x)%BITS_PER_LONG)
-/* #define BIT(x)                  (1UL<<OFF(x)) */
 #define LONG(x)                 ((x)/BITS_PER_LONG)
 #define test_bit(bit, array)    ((array[LONG(bit)] >> OFF(bit)) & 1)
 
diff --git a/src/render/software/SDL_rotate.c b/src/render/software/SDL_rotate.c
index 5813b9478..6b6c2fa09 100644
--- a/src/render/software/SDL_rotate.c
+++ b/src/render/software/SDL_rotate.c
@@ -76,11 +76,6 @@ to a situation where the program can segfault.
 */
 #define GUARD_ROWS (2)
 
-/* !
-\brief Lower limit of absolute zoom factor or rotation degrees.
-*/
-/* #define VALUE_LIMIT 0.001 */
-
 /* !
 \brief Returns colorkey info for a surface
 */
diff --git a/src/video/SDL_RLEaccel.c b/src/video/SDL_RLEaccel.c
index 4f8b0e7fc..6eb8ecb34 100644
--- a/src/video/SDL_RLEaccel.c
+++ b/src/video/SDL_RLEaccel.c
@@ -90,11 +90,6 @@
 #include "SDL_blit.h"
 #include "SDL_RLEaccel_c.h"
 
-/*
-#ifndef MAX
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
-#endif
-*/
 #ifndef MIN
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #endif
diff --git a/src/video/SDL_bmp.c b/src/video/SDL_bmp.c
index 2cefcd1b5..2d9cf240b 100644
--- a/src/video/SDL_bmp.c
+++ b/src/video/SDL_bmp.c
@@ -43,8 +43,8 @@
 /* Compression encodings for BMP files */
 #ifndef BI_RGB
 #define BI_RGB      0
-/* #define BI_RLE8     1 */
-/* #define BI_RLE4     2 */
+#define BI_RLE8     1
+#define BI_RLE4     2
 #define BI_BITFIELDS    3
 #endif
 
diff --git a/src/video/x11/SDL_x11opengl.c b/src/video/x11/SDL_x11opengl.c
index c29f71de8..0f050f7b3 100644
--- a/src/video/x11/SDL_x11opengl.c
+++ b/src/video/x11/SDL_x11opengl.c
@@ -519,18 +519,6 @@ X11_GL_GetVisual(_THIS, Display * display, int screen)
     return vinfo;
 }
 
-#if 0
-#ifndef GLXBadContext
-#define GLXBadContext 0
-#endif
-#ifndef GLXBadFBConfig
-#define GLXBadFBConfig 9
-#endif
-#ifndef GLXBadProfileARB
-#define GLXBadProfileARB 13
-#endif
-#endif
-
 static int (*handler) (Display *, XErrorEvent *) = NULL;
 static const char *errorHandlerOperation = NULL;
 static int errorBase = 0;
diff --git a/src/video/x11/SDL_x11window.c b/src/video/x11/SDL_x11window.c
index 7ed27baf8..0464728e3 100644
--- a/src/video/x11/SDL_x11window.c
+++ b/src/video/x11/SDL_x11window.c
@@ -44,7 +44,6 @@
 
 #define _NET_WM_STATE_REMOVE    0l
 #define _NET_WM_STATE_ADD       1l
-/* #define _NET_WM_STATE_TOGGLE    2l */
 
 static Bool isMapNotify(Display *dpy, XEvent *ev, XPointer win)
 {