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-rw-r--r--src/noise.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/noise.cpp b/src/noise.cpp
index 2f4de6855..d98d4dafb 100644
--- a/src/noise.cpp
+++ b/src/noise.cpp
@@ -35,7 +35,8 @@
#define NOISE_MAGIC_X 1619
#define NOISE_MAGIC_Y 31337
#define NOISE_MAGIC_Z 52591
-#define NOISE_MAGIC_SEED 1013
+// Unsigned magic seed prevents undefined behavior.
+#define NOISE_MAGIC_SEED 1013U
typedef float (*Interp2dFxn)(
float v00, float v10, float v01, float v11,