diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index a9cd5ae4ad..fe957d19f1 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -873,6 +873,7 @@ input[type="checkbox"] {
   cursor: pointer;
 }
 
+input[type="image"],
 input[type="submit"],
 input[type="reset"],
 input[type="button"],
diff --git a/less/forms.less b/less/forms.less
index 10c586ee08..633ad45517 100644
--- a/less/forms.less
+++ b/less/forms.less
@@ -139,7 +139,8 @@ input[type="checkbox"] {
   cursor: pointer;
 }
 
-// Reset width of input buttons, radios, checkboxes
+// Reset width of input images, buttons, radios, checkboxes
+input[type="image"],
 input[type="submit"],
 input[type="reset"],
 input[type="button"],