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-rw-r--r--xf86atomic.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/xf86atomic.h b/xf86atomic.h
index 922b37da..70e91866 100644
--- a/xf86atomic.h
+++ b/xf86atomic.h
@@ -101,7 +101,7 @@ typedef struct { LIBDRM_ATOMIC_TYPE atomic; } atomic_t;
#endif
-#if ! HAS_ATOMIC_OPS
+#if !defined(HAS_ATOMIC_OPS)
#error libdrm requires atomic operations, please define them for your CPU/compiler.
#endif