diff --git a/Source/Core/DolphinWX/Src/InputConfigDiag.cpp b/Source/Core/DolphinWX/Src/InputConfigDiag.cpp
index 6a740aae45..33471f9d9b 100644
--- a/Source/Core/DolphinWX/Src/InputConfigDiag.cpp
+++ b/Source/Core/DolphinWX/Src/InputConfigDiag.cpp
@@ -6,6 +6,9 @@
 #include "UDPConfigDiag.h"
 #include "WxUtils.h"
 #include "HW/Wiimote.h"
+#include "ControllerInterface/ExpressionParser.h"
+
+using namespace ciface::ExpressionParser;
 
 void GamepadPage::ConfigUDPWii(wxCommandEvent &event)
 {
@@ -225,6 +228,18 @@ void ControlDialog::UpdateGUI()
 	// updates the "bound controls:" label
 	m_bound_label->SetLabel(wxString::Format(_("Bound Controls: %lu"),
 		(unsigned long)control_reference->BoundCount()));
+
+	switch (control_reference->parse_error)
+	{
+	case EXPRESSION_PARSE_SYNTAX_ERROR:
+		m_error_label->SetLabel("Syntax error");
+		break;
+	case EXPRESSION_PARSE_NO_DEVICE:
+		m_error_label->SetLabel("Device not found");
+		break;
+	default:
+		m_error_label->SetLabel("");
+	}
 };
 
 void GamepadPage::UpdateGUI()
@@ -560,7 +575,9 @@ wxStaticBoxSizer* ControlDialog::CreateControlChooser(GamepadPage* const parent)
 
 	range_slider->Bind(wxEVT_SCROLL_CHANGED, &GamepadPage::AdjustControlOption, parent);
 	wxStaticText* const range_label = new wxStaticText(this, -1, _("Range"));
+
 	m_bound_label = new wxStaticText(this, -1, wxT(""));
+	m_error_label = new wxStaticText(this, -1, wxT(""));
 
 	wxBoxSizer* const range_sizer = new wxBoxSizer(wxHORIZONTAL);
 	range_sizer->Add(range_label, 0, wxCENTER|wxLEFT, 5);
@@ -579,6 +596,7 @@ wxStaticBoxSizer* ControlDialog::CreateControlChooser(GamepadPage* const parent)
 	main_szr->Add(textctrl, 1, wxEXPAND|wxLEFT|wxRIGHT|wxBOTTOM, 5);
 	main_szr->Add(bottom_btns_sizer, 0, wxEXPAND|wxBOTTOM|wxRIGHT, 5);
 	main_szr->Add(m_bound_label, 0, wxCENTER, 0);
+	main_szr->Add(m_error_label, 0, wxCENTER, 0);
 
 	UpdateListContents();
 
diff --git a/Source/Core/DolphinWX/Src/InputConfigDiag.h b/Source/Core/DolphinWX/Src/InputConfigDiag.h
index 475fa9ed5e..0a355c1d2f 100644
--- a/Source/Core/DolphinWX/Src/InputConfigDiag.h
+++ b/Source/Core/DolphinWX/Src/InputConfigDiag.h
@@ -112,6 +112,7 @@ public:
 private:
 	GamepadPage* const		m_parent;
 	wxStaticText*		m_bound_label;
+	wxStaticText*		m_error_label;
 	DeviceQualifier	m_devq;
 	bool GetExpressionForSelectedControl(wxString &expr);
 };
diff --git a/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.cpp b/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.cpp
index f0870a18a4..d2982bba24 100644
--- a/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.cpp
+++ b/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.cpp
@@ -228,9 +228,7 @@ void ControllerInterface::UpdateReference(ControllerInterface::ControlReference*
 	ref->parsed_expression = NULL;
 
 	ControlFinder finder(*this, default_device, ref->is_input);
-	ExpressionParseStatus status;
-	status = ParseExpression(ref->expression, finder, &ref->parsed_expression);
-	// XXX: do something with status?
+	ref->parse_error = ParseExpression(ref->expression, finder, &ref->parsed_expression);
 }
 
 //
diff --git a/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.h b/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.h
index 711f393894..00b4b2c07d 100644
--- a/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.h
+++ b/Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.h
@@ -64,6 +64,7 @@ public:
 		ControlState range;
 		std::string			expression;
 		const bool			is_input;
+		ciface::ExpressionParser::ExpressionParseStatus parse_error;
 
 		virtual ~ControlReference() {
 			delete parsed_expression;