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-rw-r--r--src/math/acosf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/math/acosf.c b/src/math/acosf.c
index b4665d02..945347cb 100644
--- a/src/math/acosf.c
+++ b/src/math/acosf.c
@@ -19,7 +19,7 @@ static const float
one = 1.0000000000e+00, /* 0x3F800000 */
pi = 3.1415925026e+00, /* 0x40490fda */
pio2_hi = 1.5707962513e+00; /* 0x3fc90fda */
-static volatile float
+static const volatile float
pio2_lo = 7.5497894159e-08; /* 0x33a22168 */
static const float
pS0 = 1.6666586697e-01,