diff --git a/gdb-port/README.md b/gdb-port/README.md
index 92946b9a7b1aeef5616542a16dac2cf6fcd5c1e8..f3e7b71047d683a3da3aae825cd233054cf4ca8f 100644
--- a/gdb-port/README.md
+++ b/gdb-port/README.md
@@ -1,6 +1,8 @@
 Requirements
 
 - Hammer and the target parser (pdf, for now) must be built with debug symbols for the tool to work
+  - Specifically, both of them need to be compiled with the "-g" flag
+  - Alternatively, if a symbol file is available, loading it with the `symbol-file` gdb command, or the `-s` command line switch before executing the scripts should also work
 - The GUI component uses Tkinter to draw a window
 
 Invocation