diff --git a/assets/js/wc-quantity-increment.js b/assets/js/wc-quantity-increment.js
index 45c5bbc..9838824 100644
--- a/assets/js/wc-quantity-increment.js
+++ b/assets/js/wc-quantity-increment.js
@@ -12,7 +12,7 @@ jQuery( function( $ ) {
 	}
 
 	function wcqi_refresh_quantity_increments(){
-		$( 'div.quantity:not(.buttons_added), td.quantity:not(.buttons_added)' ).addClass( 'buttons_added' ).append( '<input type="button" value="+" class="plus" />' ).prepend( '<input type="button" value="-" class="minus" />' );
+		$( 'div.quantity:not(.buttons_added):not(:has(input:hidden)), td.quantity:not(.buttons_added):not(:has(input:hidden))' ).addClass( 'buttons_added' ).append( '<input type="button" value="+" class="plus" />' ).prepend( '<input type="button" value="-" class="minus" />' );
 	}
 
 	$( document ).on( 'updated_wc_div', function() {
diff --git a/assets/js/wc-quantity-increment.min.js b/assets/js/wc-quantity-increment.min.js
index 7c1edb2..fdd647b 100644
--- a/assets/js/wc-quantity-increment.min.js
+++ b/assets/js/wc-quantity-increment.min.js
@@ -1 +1 @@
-jQuery(function(a){function b(){a("div.quantity:not(.buttons_added), td.quantity:not(.buttons_added)").addClass("buttons_added").append('<input type="button" value="+" class="plus" />').prepend('<input type="button" value="-" class="minus" />')}String.prototype.getDecimals||(String.prototype.getDecimals=function(){var a=this,b=(""+a).match(/(?:\.(\d+))?(?:[eE]([+-]?\d+))?$/);return b?Math.max(0,(b[1]?b[1].length:0)-(b[2]?+b[2]:0)):0}),a(document).on("updated_wc_div",function(){b()}),a(document).on("click",".plus, .minus",function(){var b=a(this).closest(".quantity").find(".qty"),c=parseFloat(b.val()),d=parseFloat(b.attr("max")),e=parseFloat(b.attr("min")),f=b.attr("step");c&&""!==c&&"NaN"!==c||(c=0),""!==d&&"NaN"!==d||(d=""),""!==e&&"NaN"!==e||(e=0),"any"!==f&&""!==f&&void 0!==f&&"NaN"!==parseFloat(f)||(f=1),a(this).is(".plus")?d&&c>=d?b.val(d):b.val((c+parseFloat(f)).toFixed(f.getDecimals())):e&&c<=e?b.val(e):c>0&&b.val((c-parseFloat(f)).toFixed(f.getDecimals())),b.trigger("change")}),b()});
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+jQuery(function(a){function b(){a("div.quantity:not(.buttons_added):not(:has(input:hidden)), td.quantity:not(.buttons_added):not(:has(input:hidden))").addClass("buttons_added").append('<input type="button" value="+" class="plus" />').prepend('<input type="button" value="-" class="minus" />')}String.prototype.getDecimals||(String.prototype.getDecimals=function(){var a=this,b=(""+a).match(/(?:\.(\d+))?(?:[eE]([+-]?\d+))?$/);return b?Math.max(0,(b[1]?b[1].length:0)-(b[2]?+b[2]:0)):0}),a(document).on("updated_wc_div",function(){b()}),a(document).on("click",".plus, .minus",function(){var b=a(this).closest(".quantity").find(".qty"),c=parseFloat(b.val()),d=parseFloat(b.attr("max")),e=parseFloat(b.attr("min")),f=b.attr("step");c&&""!==c&&"NaN"!==c||(c=0),""!==d&&"NaN"!==d||(d=""),""!==e&&"NaN"!==e||(e=0),"any"!==f&&""!==f&&void 0!==f&&"NaN"!==parseFloat(f)||(f=1),a(this).is(".plus")?d&&c>=d?b.val(d):b.val((c+parseFloat(f)).toFixed(f.getDecimals())):e&&c<=e?b.val(e):c>0&&b.val((c-parseFloat(f)).toFixed(f.getDecimals())),b.trigger("change")}),b()});
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