Binutils 2.41 reports: Error: operand size mismatch for `push'

diff -wpruN --no-dereference '--exclude=*.orig' a~/BhyvePkg/Csm/BhyveCsm16/BhyveCsm16Asm.S a/BhyvePkg/Csm/BhyveCsm16/BhyveCsm16Asm.S
--- a~/BhyvePkg/Csm/BhyveCsm16/BhyveCsm16Asm.S	1970-01-01 00:00:00
+++ a/BhyvePkg/Csm/BhyveCsm16/BhyveCsm16Asm.S	1970-01-01 00:00:00
@@ -461,7 +461,7 @@ CsmEntry:
         lgdt    (GDT.Pointer64)
         /* Load CS with 16 bit segment and flush the instruction cache. */
         push    $CODE16_SEL
-        push    $(2f - 0xf0000)
+        pushq   $(2f - 0xf0000)
         retfq
 
         .code16
@@ -700,7 +700,7 @@ LongToReal:
 
         /* Load CS with 16 bit segment and flush the instruction cache. */
         push    $CODE16_SEL
-        push    $(2f - 0xf0000)
+        pushq   $(2f - 0xf0000)
         retfq
 
         .code16