diff --git a/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.cpp b/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.cpp
index 8759244a..ead2df41 100644
--- a/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.cpp
+++ b/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.cpp
@@ -2,6 +2,42 @@
 
 namespace chowdsp
 {
+MetricParameter::MetricParameter (const ParameterID& parameterID,
+                                  const juce::String& paramName,
+                                  const juce::NormalisableRange<float>& paramRange,
+                                  float defaultValue,
+                                  const juce::String& unitSuffix,
+                                  int numDecimalPlaces)
+    : MetricParameter (
+        parameterID,
+        paramName,
+        paramRange,
+        defaultValue,
+        [numDecimalPlaces, unitSuffix] (float v)
+        { return toString (v, numDecimalPlaces) + unitSuffix; })
+{
+}
+
+MetricParameter::MetricParameter (
+    const ParameterID& parameterID,
+    const juce::String& paramName,
+    const juce::NormalisableRange<float>& paramRange,
+    float defaultValue,
+    const std::function<juce::String (float)>& valueToTextFunction,
+    std::function<float (const juce::String&)>&& textToValueFunction)
+    : FloatParameter (
+        parameterID,
+        paramName,
+        paramRange,
+        defaultValue,
+        valueToTextFunction,
+        textToValueFunction != nullptr
+            ? std::move (textToValueFunction)
+            : [] (const juce::String& str)
+            { return fromString (str); })
+{
+}
+
 juce::String MetricParameter::toString (float value, int numDecimalPlaces)
 {
     if (value < 1.0e-9f) // pico
diff --git a/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.h b/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.h
index 682734e1..4503acf6 100644
--- a/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.h
+++ b/modules/plugin/chowdsp_parameters/ParamUtils/chowdsp_MetricParameter.h
@@ -13,38 +13,20 @@ class MetricParameter : public FloatParameter
                      const juce::NormalisableRange<float>& paramRange,
                      float defaultValue,
                      const juce::String& unitSuffix = {},
-                     int numDecimalPlaces = 2)
-        : MetricParameter (
-            parameterID,
-            paramName,
-            paramRange,
-            defaultValue,
-            [numDecimalPlaces, unitSuffix] (float v)
-            { return toString (v, numDecimalPlaces) + unitSuffix; })
-    {
-    }
+                     int numDecimalPlaces = 2);
 
-    MetricParameter (const ParameterID& parameterID,
-                     const juce::String& paramName,
-                     const juce::NormalisableRange<float>& paramRange,
-                     float defaultValue,
-                     const std::function<juce::String (float)>& valueToTextFunction,
-                     std::function<float (const juce::String&)>&& textToValueFunction = [] (const juce::String& str) { return fromString (str); })
-        : FloatParameter (
-            parameterID,
-            paramName,
-            paramRange,
-            defaultValue,
-            valueToTextFunction,
-            std::move (textToValueFunction))
-    {
-    }
+    MetricParameter (
+        const ParameterID& parameterID,
+        const juce::String& paramName,
+        const juce::NormalisableRange<float>& paramRange,
+        float defaultValue,
+        const std::function<juce::String (float)>& valueToTextFunction,
+        std::function<float (const juce::String&)>&& textToValueFunction = nullptr);
 
     static juce::String toString (float value, int numDecimalPlaces);
     static float fromString (const juce::String& str);
 
 private:
-
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MetricParameter)
 };
 } // namespace chowdsp