diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index 8791a52..702ec26 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -6264,6 +6264,27 @@
     assert_equal('foo', A.Foo())
   END
   v9.CheckSourceSuccess(lines)
+
+  # Invoke method returning a value through the abstract class. See #15432.
+  lines =<< trim END
+    vim9script
+
+    abstract class A
+        abstract def String(): string
+    endclass
+
+    class B extends A
+        def String(): string
+            return 'B'
+        enddef
+    endclass
+
+    def F(o: A)
+        assert_equal('B', o.String())
+    enddef
+    F(B.new())
+  END
+  v9.CheckSourceSuccess(lines)
 enddef
 
 " Test for calling a class method from a subclass
diff --git a/src/version.c b/src/version.c
index edde65f..9bfca00 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    674,
+/**/
     673,
 /**/
     672,
diff --git a/src/vim9compile.c b/src/vim9compile.c
index ea305b7..de13f9b 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -4120,8 +4120,9 @@
     ufunc->uf_args_visible = ufunc->uf_args.ga_len;
 
     // Compiling a function in an interface is done to get the function type.
-    // No code is actually compiled.
-    if (ufunc->uf_class != NULL && IS_INTERFACE(ufunc->uf_class))
+    // No code is actually compiled. Same goes for an abstract method.
+    if ((ufunc->uf_class != NULL && IS_INTERFACE(ufunc->uf_class))
+	|| IS_ABSTRACT_METHOD(ufunc))
     {
 	ufunc->uf_def_status = UF_NOT_COMPILED;
 	ret = OK;