diff --git a/libsrc/rp6502/_localtime.c b/libsrc/rp6502/_localtime.c
index 6455c69f7..2b3cb013f 100644
--- a/libsrc/rp6502/_localtime.c
+++ b/libsrc/rp6502/_localtime.c
@@ -8,7 +8,7 @@ struct tm* __fastcall__ _time_t_to_tm (const time_t t);
 
 struct tm* __fastcall__ _localtime (const time_t* timep)
 {
-    long time = *timep;
+    time_t time = *timep;
     struct tm* tm;
     ria_set_axsreg (*timep);
     time += ria_call_long (RIA_OP_TZQUERY);