diff --git a/audio/out/ao_alsa.c b/audio/out/ao_alsa.c
index 39c3f03118..b86bf5d89e 100644
--- a/audio/out/ao_alsa.c
+++ b/audio/out/ao_alsa.c
@@ -42,8 +42,11 @@
 
 #include <alsa/asoundlib.h>
 
-#define HAVE_CHMAP_API \
-    (defined(SND_CHMAP_API_VERSION) && SND_CHMAP_API_VERSION >= (1 << 16))
+#if defined(SND_CHMAP_API_VERSION) && SND_CHMAP_API_VERSION >= (1 << 16)
+#define HAVE_CHMAP_API 1
+#else
+#define HAVE_CHMAP_API 0
+#endif
 
 #include "ao.h"
 #include "internal.h"
diff --git a/audio/out/ao_oss.c b/audio/out/ao_oss.c
index 72413cd9f8..1300a72043 100644
--- a/audio/out/ao_oss.c
+++ b/audio/out/ao_oss.c
@@ -56,7 +56,11 @@
 // Define to 0 if the device must be reopened to reset it (stop all playback,
 // clear the buffer), and the device should be closed when unused.
 // Define to 1 if SNDCTL_DSP_RESET should be used to reset without close.
-#define KEEP_DEVICE (defined(SNDCTL_DSP_RESET) && !defined(__NetBSD__))
+#if defined(SNDCTL_DSP_RESET) && !defined(__NetBSD__)
+#define KEEP_DEVICE 1
+#else
+#define KEEP_DEVICE 0
+#endif
 
 #define PATH_DEV_DSP "/dev/dsp"
 #define PATH_DEV_MIXER "/dev/mixer"
diff --git a/stream/tvi_v4l2.c b/stream/tvi_v4l2.c
index bd7ecd1e27..57bf6b875f 100644
--- a/stream/tvi_v4l2.c
+++ b/stream/tvi_v4l2.c
@@ -72,7 +72,11 @@ known issues:
 #define V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC 0x2000
 #endif
 
-#define HAVE_CLOCK_GETTIME (defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0)
+#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
+#define HAVE_CLOCK_GETTIME 1
+#else
+#define HAVE_CLOCK_GETTIME 0
+#endif
 
 #define info tvi_info_v4l2
 static tvi_handle_t *tvi_init_v4l2(struct mp_log *log, tv_param_t* tv_param);