diff --git a/src/libexpr/nixexpr.cc b/src/libexpr/nixexpr.cc
index bc53ca053..2d2fe1fcc 100644
--- a/src/libexpr/nixexpr.cc
+++ b/src/libexpr/nixexpr.cc
@@ -50,6 +50,16 @@ void ExprVar::show(const SymbolTable & symbols, std::ostream & str) const
     str << symbols[name];
 }
 
+void ExprInheritFrom::show(SymbolTable const & symbols, std::ostream & str) const
+{
+    if (name) {
+        str << symbols[name];
+    } else {
+        // We can't get at the actual dynamic expression from here.
+        str << "(dynamic inherit)";
+    }
+}
+
 void ExprSelect::show(const SymbolTable & symbols, std::ostream & str) const
 {
     str << "(";
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index 418f888b3..ef4e55d99 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -151,7 +151,8 @@ struct ExprInheritFrom : ExprVar
         this->fromWith = nullptr;
     }
 
-    void bindVars(EvalState & es, const std::shared_ptr<const StaticEnv> & env);
+    void show(SymbolTable const & symbols, std::ostream & str) const override;
+    void bindVars(EvalState & es, const std::shared_ptr<const StaticEnv> & env) override;
 };
 
 struct ExprSelect : Expr
diff --git a/tests/unit/libexpr/expr-print.cc b/tests/unit/libexpr/expr-print.cc
new file mode 100644
index 000000000..dc0ee27ed
--- /dev/null
+++ b/tests/unit/libexpr/expr-print.cc
@@ -0,0 +1,32 @@
+#include <sstream>
+#include <string_view>
+
+#include <gtest/gtest.h>
+
+#include "tests/libexpr.hh"
+
+#include "nixexpr.hh"
+
+namespace nix
+{
+
+using namespace testing;
+struct ExprPrintingTests : LibExprTest
+{
+    void test(Expr const & expr, std::string_view expected)
+    {
+        std::stringstream out;
+        expr.show(state.symbols, out);
+        ASSERT_EQ(out.str(), expected);
+    }
+};
+
+TEST_F(ExprPrintingTests, ExprInheritFrom)
+{
+    // ExprInheritFrom has its own show() impl.
+    // If it uses its parent class's impl it will crash.
+    ExprInheritFrom const eInheritFrom(noPos, 0);
+    test(eInheritFrom, "(dynamic inherit)");
+}
+
+}
diff --git a/tests/unit/meson.build b/tests/unit/meson.build
index 2b5471526..e2ca95629 100644
--- a/tests/unit/meson.build
+++ b/tests/unit/meson.build
@@ -185,6 +185,7 @@ libexpr_tests_sources = files(
   'libexpr/primops.cc',
   'libexpr/search-path.cc',
   'libexpr/trivial.cc',
+  'libexpr/expr-print.cc',
   'libexpr/value/context.cc',
   'libexpr/value/print.cc',
 )