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-rw-r--r--wcsmbs/wcstof.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/wcsmbs/wcstof.c b/wcsmbs/wcstof.c
index ef1448b096..f410e4cf32 100644
--- a/wcsmbs/wcstof.c
+++ b/wcsmbs/wcstof.c
@@ -30,6 +30,8 @@
 #define SET_MANTISSA(flt, mant) \
   do { union ieee754_float u;						      \
        u.f = (flt);							      \
+       if ((mant & 0x7fffff) == 0)					      \
+	 mant = 0x400000;						      \
        u.ieee.mantissa = (mant) & 0x7fffff;				      \
        (flt) = u.f;							      \
   } while (0)