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-rw-r--r--src/math/fmaf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/math/fmaf.c b/src/math/fmaf.c
index aa57feb6..80f5cd8a 100644
--- a/src/math/fmaf.c
+++ b/src/math/fmaf.c
@@ -50,7 +50,7 @@ float fmaf(float x, float y, float z)
/* Common case: The double precision result is fine. */
if ((u.i & 0x1fffffff) != 0x10000000 || /* not a halfway case */
e == 0x7ff || /* NaN */
- result - xy == z || /* exact */
+ (result - xy == z && result - z == xy) || /* exact */
fegetround() != FE_TONEAREST) /* not round-to-nearest */
{
/*