diff --git a/parse.yy b/parse.yy
index 3eb4b2be..33e19dbc 100644
--- a/parse.yy
+++ b/parse.yy
@@ -1862,6 +1862,8 @@ function_definition
             const FunctionType *funcType = CastType<FunctionType>($2->type);
             if (funcType == NULL)
                 AssertPos(@1, m->errorCount > 0);
+            else if ($1->storageClass == SC_TYPEDEF)
+                Error(@1, "Illegal \"typedef\" provided with function definition.");
             else {
                 Stmt *code = $4;
                 if (code == NULL) code = new StmtList(@4);
diff --git a/tests_errors/func-def-with-typedef.ispc b/tests_errors/func-def-with-typedef.ispc
new file mode 100644
index 00000000..a750a9be
--- /dev/null
+++ b/tests_errors/func-def-with-typedef.ispc
@@ -0,0 +1,4 @@
+// Illegal "typedef" provided with function definition
+
+typedef float foo(float a, float b) { }
+