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-rw-r--r--lib/libm/__signbitl.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/libm/__signbitl.c b/lib/libm/__signbitl.c
index b66d419f..7b02186a 100644
--- a/lib/libm/__signbitl.c
+++ b/lib/libm/__signbitl.c
@@ -1,4 +1,6 @@
-#include "libm.h"
+#include "libm.h" // for ldshape, ldshape::(anonymous)
+
+#include <float.h> // for LDBL_MANT_DIG, LDBL_MAX_EXP
#if (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
int __signbitl(long double x)