diff --git a/indra/llui/llspinctrl.cpp b/indra/llui/llspinctrl.cpp
index 934879cdfd1dbd573b2ede3a8275c13be48b4001..8a728df2e7226d4b3e604f1cf3108abd3ebee9fe 100644
--- a/indra/llui/llspinctrl.cpp
+++ b/indra/llui/llspinctrl.cpp
@@ -52,6 +52,7 @@ LLSpinCtrl::Params::Params()
 :	label_width("label_width"),
 	decimal_digits("decimal_digits"),
 	allow_text_entry("allow_text_entry", true),
+	allow_digits_only("allow_digits_only", false),
 	label_wrap("label_wrap", false),
 	text_enabled_color("text_enabled_color"),
 	text_disabled_color("text_disabled_color"),
@@ -129,6 +130,10 @@ LLSpinCtrl::LLSpinCtrl(const LLSpinCtrl::Params& p)
 	params.follows.flags(FOLLOWS_LEFT | FOLLOWS_BOTTOM);
 	mEditor = LLUICtrlFactory::create<LLLineEditor> (params);
 	mEditor->setFocusReceivedCallback( boost::bind(&LLSpinCtrl::onEditorGainFocus, _1, this ));
+	if (p.allow_digits_only)
+	{
+		mEditor->setPrevalidateInput(LLTextValidate::validateNonNegativeS32NoSpace);
+	}
 	//RN: this seems to be a BAD IDEA, as it makes the editor behavior different when it has focus
 	// than when it doesn't.  Instead, if you always have to double click to select all the text, 
 	// it's easier to understand
diff --git a/indra/llui/llspinctrl.h b/indra/llui/llspinctrl.h
index 87814f838e8d2c47a814b0036dd1fb23520a988e..e34add879d5155ad039b2d118a01546f1787798b 100644
--- a/indra/llui/llspinctrl.h
+++ b/indra/llui/llspinctrl.h
@@ -44,6 +44,7 @@ class LLSpinCtrl
 		Optional<S32> label_width;
 		Optional<U32> decimal_digits;
 		Optional<bool> allow_text_entry;
+		Optional<bool> allow_digits_only;
 		Optional<bool> label_wrap;
 
 		Optional<LLUIColor> text_enabled_color;
diff --git a/indra/newview/skins/default/xui/en/floater_conversation_preview.xml b/indra/newview/skins/default/xui/en/floater_conversation_preview.xml
index 825a88e4e15443dcececd0cf85bfe1a3eb4de1b2..0e5af67f687b8a1f732dadea91073ce4ac0039e7 100644
--- a/indra/newview/skins/default/xui/en/floater_conversation_preview.xml
+++ b/indra/newview/skins/default/xui/en/floater_conversation_preview.xml
@@ -39,6 +39,7 @@
      width="35">
     </text>
     <spinner
+     allow_digits_only="true"
      decimal_digits="0"
      follows="bottom|right"
      height="23"