diff --git a/panda/src/mathutil/plane_src.cxx b/panda/src/mathutil/plane_src.cxx
index 7ba18701c6..4463d57756 100644
--- a/panda/src/mathutil/plane_src.cxx
+++ b/panda/src/mathutil/plane_src.cxx
@@ -158,3 +158,17 @@ void FLOATNAME(LPlane)::
 write(std::ostream &out, int indent_level) const {
   indent(out, indent_level) << *this << "\n";
 }
+
+/**
+ * Returns a string representation of this LPlane.
+ */
+std::string FLOATNAME(LPlane)::
+__repr__() const {
+  std::ostringstream out;
+  out << "LPlane" << FLOATTOKEN << "("
+      << MAYBE_ZERO(_v(0)) << ", "
+      << MAYBE_ZERO(_v(1)) << ", "
+      << MAYBE_ZERO(_v(2)) << ", "
+      << MAYBE_ZERO(_v(3)) << ")";
+  return out.str();
+}
diff --git a/panda/src/mathutil/plane_src.h b/panda/src/mathutil/plane_src.h
index c1dffc4d5d..c1d7ef0252 100644
--- a/panda/src/mathutil/plane_src.h
+++ b/panda/src/mathutil/plane_src.h
@@ -61,6 +61,7 @@ PUBLISHED:
 
   void output(std::ostream &out) const;
   void write(std::ostream &out, int indent_level = 0) const;
+  std::string __repr__() const;
 };
 
 INLINE_MATHUTIL std::ostream &