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-rw-r--r--src/mpfr-impl.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mpfr-impl.h b/src/mpfr-impl.h
index 805e3cb4a..e2a2dd0d9 100644
--- a/src/mpfr-impl.h
+++ b/src/mpfr-impl.h
@@ -57,6 +57,7 @@ https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
#include <stdlib.h>
#include <limits.h>
+#include <float.h> /* for FLT_RADIX, etc., tested below */
/******************************************************