diff --git a/src/math/fpclassify.c b/src/math/fpclassify.c
index 8a43cd6..bc77d8c 100644
--- a/src/math/fpclassify.c
+++ b/src/math/fpclassify.c
@@ -51,10 +51,17 @@ static struct {
 	T(-0.0/0.0, FP_NAN)
 	T(1/0.0, FP_INFINITE)
 	T(-1/0.0, FP_INFINITE)
+#if LDBL_MAX_EXP==16384
 	T(0x1.ffffp16383L, FP_NORMAL)
 	T(-0x1.ffffp16383L, FP_NORMAL)
 	T(0x1p-16383L, FP_SUBNORMAL)
 	T(-0x1p-16383L, FP_SUBNORMAL)
+#elif LDBL_MAX_EXP==1024
+	T(0x1.ffffp1023L, FP_NORMAL)
+	T(-0x1.ffffp1023L, FP_NORMAL)
+	T(0x1p-1023L, FP_SUBNORMAL)
+	T(-0x1p-1023L, FP_SUBNORMAL)
+#endif
 	T(0.0, FP_ZERO)
 	T(-0.0, FP_ZERO)
 	T(3.14, FP_NORMAL)