--- rpl/src/formateur.c	2013/02/27 17:11:40	1.55
+++ rpl/src/formateur.c	2013/03/16 11:31:41	1.56
@@ -3522,7 +3522,15 @@ formateur_reel(struct_processus *s_etat_
 		}
 		else if (tampon_entier < ((integer8) 0))
 		{
-			exposant = (long) floor(log10(-tampon_entier));
+			if (tampon_entier != INT64_MIN)
+			{
+				exposant = (long) floor(log10(-tampon_entier));
+			}
+			else
+			{
+				tampon_reel = (real8) tampon_entier;
+				exposant = (long) floor(log10(-tampon_reel));
+			}
 		}
 		else
 		{