1 files changed, 1 insertions, 1 deletions
diff --git a/perlapi.c b/perlapi.c
index fc5ca244b8..b554ed539a 100644
--- a/perlapi.c
+++ b/perlapi.c
@@ -1610,7 +1610,7 @@ Perl_mg_set(pTHXo_ SV* sv)
 }
 
 #undef  Perl_mg_size
-IV
+I32
 Perl_mg_size(pTHXo_ SV* sv)
 {
     return ((CPerlObj*)pPerl)->Perl_mg_size(sv);