diff --git a/pico/cd/memory.c b/pico/cd/memory.c
index 05ee3e13..c51ba1f6 100644
--- a/pico/cd/memory.c
+++ b/pico/cd/memory.c
@@ -1185,7 +1185,7 @@ PICO_INTERNAL void PicoMemSetupCD(void)
 #ifdef __clang__
     volatile // prevent strange relocs from clang
 #endif
-    unsigned long ptr_ram = (uptr)PicoMem.ram;
+    uptr ptr_ram = (uptr)PicoMem.ram;
     int i;
 
     // M68k