1 files changed, 5 insertions, 2 deletions
diff --git a/rect.c b/rect.c
index 3cb67bd..b13de75 100644
--- a/rect.c
+++ b/rect.c
@@ -163,7 +163,10 @@ static char *encode_params(const game_params *params, bool full)
 
     sprintf(data, "%dx%d", params->w, params->h);
     if (full && params->expandfactor)
-        sprintf(data + strlen(data), "e%g", params->expandfactor);
+    {
+        sprintf(data + strlen(data), "e");
+        ftoa(data + strlen(data), params->expandfactor);
+    }
     if (full && !params->unique)
         strcat(data, "a");
 
@@ -189,7 +192,7 @@ static config_item *game_configure(const game_params *params)
 
     ret[2].name = "Expansion factor";
     ret[2].type = C_STRING;
-    sprintf(buf, "%g", params->expandfactor);
+    ftoa(buf, params->expandfactor);
     ret[2].u.string.sval = dupstr(buf);
 
     ret[3].name = "Ensure unique solution";