diff --git a/app/templates/acpype.html b/app/templates/acpype.html
index e6548b48..b9ddac13 100644
--- a/app/templates/acpype.html
+++ b/app/templates/acpype.html
@@ -155,9 +155,9 @@ <h6 class="d-flex flex-wrap">
       </div>
       
       <div class="form-check my-1">
-        <input class="form-check-input" type="checkbox" checked="checked" disabled="disabled" id="double">
+        <input class="form-check-input" type="checkbox" disabled="disabled" id="double">
         <label class="form-check-label" for="double">{{ _("Calcular em dupla precisão") }}</label>
-        <input type="hidden" name="double" value="True">
+        <input type="hidden" name="double" value="False">
       </div>
       
       <div class="form-check my-1">
diff --git a/app/templates/apo.html b/app/templates/apo.html
index 22e2cb58..a75eb50e 100644
--- a/app/templates/apo.html
+++ b/app/templates/apo.html
@@ -146,9 +146,9 @@ <h6 class="d-flex flex-wrap">
     </div>
     
     <div class="form-check my-1">
-      <input class="form-check-input" type="checkbox" checked="checked" disabled="disabled" id="double">
+      <input class="form-check-input" type="checkbox" disabled="disabled" id="double">
       <label class="form-check-label" for="double">{{ _("Calcular em dupla precisão") }}</label>
-      <input type="hidden" name="double" value="True">
+      <input type="hidden" name="double" value="False">
     </div>
     
     <div class="form-check my-1">
diff --git a/app/templates/prodrg.html b/app/templates/prodrg.html
index 9feee2c8..15006477 100644
--- a/app/templates/prodrg.html
+++ b/app/templates/prodrg.html
@@ -149,9 +149,9 @@ <h6 class="d-flex flex-wrap">
       </div>
       
       <div class="form-check my-1">
-        <input class="form-check-input" type="checkbox" checked="checked" disabled="disabled" id="double">
+        <input class="form-check-input" type="checkbox" disabled="disabled" id="double">
         <label class="form-check-label" for="double">{{ _("Calcular em dupla precisão") }}</label>
-        <input type="hidden" name="double" value="True">
+        <input type="hidden" name="double" value="False">
       </div>
       
       <div class="form-check my-1">