diff --git a/Core/debugger.c b/Core/debugger.c
index 0f08fb1..2240e0b 100644
--- a/Core/debugger.c
+++ b/Core/debugger.c
@@ -2175,6 +2175,29 @@ void GB_debugger_add_symbol(GB_gameboy_t *gb, uint16_t bank, uint16_t address, c
     }
 }
 
+void GB_debugger_load_symbol_file_from_buffer(GB_gameboy_t *gb, const char *buffer, size_t size)
+{
+    const char *str_ptr = buffer;
+    unsigned length = 0;
+
+    while (str_ptr && size--) {
+        length++;
+        char c = (char) *str_ptr++;
+
+        if (c == '\n' || size == 0) {
+            const char *line = str_ptr - length--;
+            unsigned bank, address;
+            char symbol[length];
+
+            if (sscanf(line, "%x:%x %s", &bank, &address, symbol) == 3) {
+                GB_debugger_add_symbol(gb, bank, address, symbol);
+            }
+
+            length = 0;
+        }
+    }
+}
+
 void GB_debugger_load_symbol_file(GB_gameboy_t *gb, const char *path)
 {
     FILE *f = fopen(path, "r");
diff --git a/Core/debugger.h b/Core/debugger.h
index b6a12d9..645a706 100644
--- a/Core/debugger.h
+++ b/Core/debugger.h
@@ -35,7 +35,7 @@ void
 #endif
 GB_debugger_execute_command(GB_gameboy_t *gb, char *input); /* Destroys input. */
 
-
+void GB_debugger_load_symbol_file_from_buffer(GB_gameboy_t *gb, const char *buffer, size_t size);
 void GB_debugger_load_symbol_file(GB_gameboy_t *gb, const char *path);
 const char *GB_debugger_name_for_address(GB_gameboy_t *gb, uint16_t addr);
 bool GB_debugger_evaluate(GB_gameboy_t *gb, const char *string, uint16_t *result, uint16_t *result_bank); /* result_bank is -1 if unused. */
diff --git a/gtk3/main.c b/gtk3/main.c
index 5e0d139..21a9c55 100644
--- a/gtk3/main.c
+++ b/gtk3/main.c
@@ -7,8 +7,6 @@
 #include <stdio.h>
 #include <string.h>
 
-// TODO: right now we need access to GB_debugger_add_symbol
-#define GB_INTERNAL
 #include <Core/gb.h>
 
 #include "settings.h"
@@ -1292,35 +1290,13 @@ static void reset(void) {
 		GB_load_battery(&gb, gui_data.battery_save_path);
 		GB_load_cheats(&gb, gui_data.cheats_save_path);
 
-		// TODO: Implement without GB_INTERNAL
-		/* GB_debugger_load_symbol_file */ {
-			GError *error = NULL;
-			GInputStream *stream = g_resources_open_stream(RESOURCE_PREFIX "Misc/registers.sym", G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
-			GDataInputStream *input_stream = g_data_input_stream_new(stream);
-			
-			char *line = NULL;
-			gsize length = 0;
-
-			while ((line = g_data_input_stream_read_line_utf8(input_stream, &length, NULL, &error))) {
-				// skip comments
-				for (unsigned i = 0; i < length; i++) {
-					if (line[i] == ';') {
-						line[i] = 0;
-						length = i;
-						break;
-					}
-				}
-				if (length == 0) continue;
-
-				unsigned bank, address;
-				char symbol[length];
-
-				if (sscanf(line, "%x:%x %s", &bank, &address, symbol) == 3) {
-					GB_debugger_add_symbol(&gb, bank, address, symbol);
-				}
-			}
-
-			g_object_unref(stream);
+		GError *error = NULL;
+		GBytes *register_sym_f = g_resources_lookup_data(RESOURCE_PREFIX "Misc/registers.sym", G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
+		if (register_sym_f) {
+			gsize register_sym_size;
+			const gchar *register_sym_data = g_bytes_get_data(register_sym_f, &register_sym_size);
+			GB_debugger_load_symbol_file_from_buffer(&gb, register_sym_data, register_sym_size);
+			g_bytes_unref(register_sym_f);
 		}
 
 		size_t path_length = strlen(path);