diff --git a/src/video/kmsdrm/SDL_kmsdrmsym.h b/src/video/kmsdrm/SDL_kmsdrmsym.h
index ef12c36b8..c2af4aa8c 100644
--- a/src/video/kmsdrm/SDL_kmsdrmsym.h
+++ b/src/video/kmsdrm/SDL_kmsdrmsym.h
@@ -63,7 +63,7 @@ SDL_KMSDRM_SYM(int,drmModeSetCrtc,(int fd, uint32_t crtcId, uint32_t bufferId,
 SDL_KMSDRM_SYM(int,drmModeCrtcGetGamma,(int fd, uint32_t crtc_id, uint32_t size,
                                         uint16_t *red, uint16_t *green, uint16_t *blue))
 SDL_KMSDRM_SYM(int,drmModeCrtcSetGamma,(int fd, uint32_t crtc_id, uint32_t size,
-                                        uint16_t *red, uint16_t *green, uint16_t *blue))
+                                        const uint16_t *red, const uint16_t *green, const uint16_t *blue))
 SDL_KMSDRM_SYM(int,drmModeSetCursor,(int fd, uint32_t crtcId, uint32_t bo_handle,
                                      uint32_t width, uint32_t height))
 SDL_KMSDRM_SYM(int,drmModeSetCursor2,(int fd, uint32_t crtcId, uint32_t bo_handle,