diff -ru gcalctool-5.5.16/gcalctool/display.c gcalctool-5.5.16-pb/gcalctool/display.c
--- gcalctool-5.5.16/gcalctool/display.c	2004-09-23 17:01:49.000000000 +0100
+++ gcalctool-5.5.16-pb/gcalctool/display.c	2004-12-22 15:37:22.000000000 +0000
@@ -315,7 +315,7 @@
     n = 0;
     mpcim(&n, MP1);
     if (!mpeq(MPmant, MP1)) {
-        while (mpge(MPmant, MP10base)) {
+        while (!eng && mpge(MPmant, MP10base)) {
             exp += 10;
             mpmul(MPmant, MPatmp, MPmant);
         }
@@ -326,7 +326,7 @@
             mpdiv(MPmant, MP1base, MPmant);
         }
  
-        while (mplt(MPmant, MPatmp)) {
+        while (!eng && mplt(MPmant, MPatmp)) {
             exp -= 10;
             mpmul(MPmant, MP10base, MPmant);
         }