diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index 89f9bfe54a..1b82a466de 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -103,7 +103,7 @@ static VideoBootStrap *bootstrap[] = {
 #ifdef SDL_VIDEO_DRIVER_N3DS
     &N3DS_bootstrap,
 #endif
-#if SDL_VIDEO_DRIVER_KMSDRM
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
     &KMSDRM_bootstrap,
 #endif
 #if SDL_VIDEO_DRIVER_RISCOS
diff --git a/src/video/kmsdrm/SDL_kmsdrmdyn.c b/src/video/kmsdrm/SDL_kmsdrmdyn.c
index d1f672db92..a5416c48b8 100644
--- a/src/video/kmsdrm/SDL_kmsdrmdyn.c
+++ b/src/video/kmsdrm/SDL_kmsdrmdyn.c
@@ -21,7 +21,7 @@
 
 #include "SDL_internal.h"
 
-#if SDL_VIDEO_DRIVER_KMSDRM
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
 
 #define DEBUG_DYNAMIC_KMSDRM 0
 
diff --git a/src/video/kmsdrm/SDL_kmsdrmevents.c b/src/video/kmsdrm/SDL_kmsdrmevents.c
index 4bd4131cb9..49c3368ba3 100644
--- a/src/video/kmsdrm/SDL_kmsdrmevents.c
+++ b/src/video/kmsdrm/SDL_kmsdrmevents.c
@@ -21,7 +21,7 @@
 
 #include "SDL_internal.h"
 
-#if SDL_VIDEO_DRIVER_KMSDRM
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
 
 #include "SDL_kmsdrmvideo.h"
 #include "SDL_kmsdrmevents.h"
diff --git a/src/video/kmsdrm/SDL_kmsdrmmouse.c b/src/video/kmsdrm/SDL_kmsdrmmouse.c
index da3064cb2b..1f397d928d 100644
--- a/src/video/kmsdrm/SDL_kmsdrmmouse.c
+++ b/src/video/kmsdrm/SDL_kmsdrmmouse.c
@@ -21,7 +21,7 @@
 
 #include "SDL_internal.h"
 
-#if SDL_VIDEO_DRIVER_KMSDRM
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
 
 #include "SDL_kmsdrmvideo.h"
 #include "SDL_kmsdrmmouse.h"
diff --git a/src/video/kmsdrm/SDL_kmsdrmopengles.c b/src/video/kmsdrm/SDL_kmsdrmopengles.c
index 1d0614c703..01cd93cfee 100644
--- a/src/video/kmsdrm/SDL_kmsdrmopengles.c
+++ b/src/video/kmsdrm/SDL_kmsdrmopengles.c
@@ -21,7 +21,7 @@
 
 #include "SDL_internal.h"
 
-#if SDL_VIDEO_DRIVER_KMSDRM
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
 
 #include "SDL_kmsdrmvideo.h"
 #include "SDL_kmsdrmopengles.h"
diff --git a/src/video/kmsdrm/SDL_kmsdrmopengles.h b/src/video/kmsdrm/SDL_kmsdrmopengles.h
index 1912454f4f..fd1ce896d9 100644
--- a/src/video/kmsdrm/SDL_kmsdrmopengles.h
+++ b/src/video/kmsdrm/SDL_kmsdrmopengles.h
@@ -23,7 +23,7 @@
 #ifndef SDL_kmsdrmopengles_h_
 #define SDL_kmsdrmopengles_h_
 
-#if SDL_VIDEO_DRIVER_KMSDRM
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
 
 #include "../SDL_sysvideo.h"
 #include "../SDL_egl_c.h"
diff --git a/src/video/kmsdrm/SDL_kmsdrmvideo.c b/src/video/kmsdrm/SDL_kmsdrmvideo.c
index d8ac3f5832..82b2fcee8a 100644
--- a/src/video/kmsdrm/SDL_kmsdrmvideo.c
+++ b/src/video/kmsdrm/SDL_kmsdrmvideo.c
@@ -21,7 +21,7 @@
 
 #include "SDL_internal.h"
 
-#if SDL_VIDEO_DRIVER_KMSDRM
+#ifdef SDL_VIDEO_DRIVER_KMSDRM
 
 /* SDL internals */
 #include "../../events/SDL_events_c.h"
diff --git a/src/video/kmsdrm/SDL_kmsdrmvulkan.c b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
index da524de4c4..f78f724cde 100644
--- a/src/video/kmsdrm/SDL_kmsdrmvulkan.c
+++ b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
@@ -26,7 +26,7 @@
 
 #include "SDL_internal.h"
 
-#if SDL_VIDEO_VULKAN && SDL_VIDEO_DRIVER_KMSDRM
+#if SDL_VIDEO_VULKAN && defined(SDL_VIDEO_DRIVER_KMSDRM)
 
 #include "SDL_kmsdrmvideo.h"
 #include "SDL_kmsdrmdyn.h"
diff --git a/src/video/kmsdrm/SDL_kmsdrmvulkan.h b/src/video/kmsdrm/SDL_kmsdrmvulkan.h
index 6c0f6ba281..66892578b6 100644
--- a/src/video/kmsdrm/SDL_kmsdrmvulkan.h
+++ b/src/video/kmsdrm/SDL_kmsdrmvulkan.h
@@ -32,7 +32,7 @@
 #include "../SDL_vulkan_internal.h"
 #include "../SDL_sysvideo.h"
 
-#if SDL_VIDEO_VULKAN && SDL_VIDEO_DRIVER_KMSDRM
+#if SDL_VIDEO_VULKAN && defined(SDL_VIDEO_DRIVER_KMSDRM)
 
 int KMSDRM_Vulkan_LoadLibrary(_THIS, const char *path);
 void KMSDRM_Vulkan_UnloadLibrary(_THIS);