diff --git a/runner.c b/runner.c
index 2bdcac9..12df443 100644
--- a/runner.c
+++ b/runner.c
@@ -17,7 +17,7 @@ void execute_library_function() {
         if (*ptr == LIB_MAGIC) {
             printf("Found libpqscheme_test 0x%X!\n", ptr);
             entry_point      = RAM_START + (*(ptr + 1));
-            entry_point      |= 1;
+            entry_point      |= 1;  // Ensure thumb mod
             func_t test_func = (func_t)(entry_point);
             if (test_func) {
                 printf("Result: %d\n", test_func());