1 files changed, 8 insertions, 1 deletions

diff --git a/src/editfns.c b/src/editfns.c
index 7efa75383ce..2cf10923b37 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -43,6 +43,13 @@ Boston, MA 02111-1307, USA.  */
 
 #include "systime.h"
 
+#ifdef STDC_HEADERS
+#include <float.h>
+#define MAX_10_EXP      DBL_MAX_10_EXP
+#else
+#define MAX_10_EXP      310
+#endif
+
 #define min(a, b) ((a) < (b) ? (a) : (b))
 #define max(a, b) ((a) > (b) ? (a) : (b))
 
@@ -3270,7 +3277,7 @@ Use %% to put a single % into the output.")
             /* Note that we're using sprintf to print floats,
                so we have to take into account what that function
                prints.  */
-            thissize = 200 + precision;
+            thissize = MAX_10_EXP + 100 + precision;
           }
         else
           {