diff --git a/include/PluginIssue.h b/include/PluginIssue.h
index 30affde83..7f42a9409 100644
--- a/include/PluginIssue.h
+++ b/include/PluginIssue.h
@@ -42,6 +42,7 @@ enum PluginIssueType
 	portHasNoDef,
 	portHasNoMin,
 	portHasNoMax,
+	defaultValueNotInRange,
 	featureNotSupported, //!< plugin requires functionality LMMS can't offer
 	badPortType, //!< port type not supported
 	blacklisted,
diff --git a/src/core/PluginIssue.cpp b/src/core/PluginIssue.cpp
index 9e7492dca..6214eba02 100644
--- a/src/core/PluginIssue.cpp
+++ b/src/core/PluginIssue.cpp
@@ -50,6 +50,8 @@ const char *PluginIssue::msgFor(const PluginIssueType &it)
 			return "port is missing min value";
 		case portHasNoMax:
 			return "port is missing max value";
+		case defaultValueNotInRange:
+			return "default value is not in range [min, max]";
 		case featureNotSupported:
 			return "required feature not supported";
 		case badPortType:
diff --git a/src/core/lv2/Lv2Ports.cpp b/src/core/lv2/Lv2Ports.cpp
index 7415fa911..3bca0c89f 100644
--- a/src/core/lv2/Lv2Ports.cpp
+++ b/src/core/lv2/Lv2Ports.cpp
@@ -151,12 +151,35 @@ std::vector<PluginIssue> Meta::get(const LilvPlugin *plugin,
 			};
 
 			takeRangeValue(def.get(), m_def, portHasNoDef);
-			if (!isToggle)
+			if (isToggle)
+			{
+				m_min = .0f;
+				m_max = 1.f;
+				if(def.get() && m_def != m_min && m_def != m_max)
+				{
+					issue(defaultValueNotInRange, portName);
+				}
+			}
+			else
 			{
 				takeRangeValue(min.get(), m_min, portHasNoMin);
 				takeRangeValue(max.get(), m_max, portHasNoMax);
 				if (hasProperty(LV2_CORE__sampleRate)) { m_sampleRate = true; }
 
+				if (def.get())
+				{
+					if (m_def < m_min) { issue(defaultValueNotInRange, portName); }
+					else if (m_def > m_max)
+					{
+						if(m_sampleRate)
+						{
+							// multiplying with sample rate will hopefully lead us
+							// to a good default value
+						}
+						else { issue(defaultValueNotInRange, portName); }
+					}
+				}
+
 				if (m_max - m_min > 15.0f)
 				{
 					// range too large for spinbox visualisation, use knobs