diff --git a/tccgen.c b/tccgen.c
index dd6a497a..305a082b 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -3478,7 +3478,7 @@ again:
                 vtop->c.i = (vtop->c.ld != 0);
             } else {
                 if(sf)
-                    vtop->c.i = vtop->c.ld;
+                    vtop->c.i = (int64_t)vtop->c.ld;
                 else if (sbt_bt == VT_LLONG || (PTR_SIZE == 8 && sbt == VT_PTR))
                     ;
                 else if (sbt & VT_UNSIGNED)