diff --git a/src/libutil/position.cc b/src/libutil/position.cc
index 946f167b6..275985c8c 100644
--- a/src/libutil/position.cc
+++ b/src/libutil/position.cc
@@ -66,6 +66,13 @@ std::optional<std::string> Pos::getSource() const
     }, origin);
 }
 
+std::optional<SourcePath> Pos::getSourcePath() const
+{
+    if (auto * path = std::get_if<SourcePath>(&origin))
+        return *path;
+    return std::nullopt;
+}
+
 void Pos::print(std::ostream & out, bool showOrigin) const
 {
     if (showOrigin) {
diff --git a/src/libutil/position.hh b/src/libutil/position.hh
index 2ac68d15a..07e261c4c 100644
--- a/src/libutil/position.hh
+++ b/src/libutil/position.hh
@@ -70,9 +70,7 @@ struct Pos
     /**
      * Get the SourcePath, if the source was loaded from a file.
      */
-    std::optional<SourcePath> getSourcePath() const {
-        return *std::get_if<SourcePath>(&origin);
-    }
+    std::optional<SourcePath> getSourcePath() const;
 
     struct LinesIterator {
         using difference_type = size_t;