diff --git a/mk/config.mk.in b/mk/config.mk.in
index 3fcc0f0..496a6f7 100644
--- a/mk/config.mk.in
+++ b/mk/config.mk.in
@@ -176,7 +176,7 @@ endif
 # Whether to use libffi for adjustors (foreign import "wrapper") or
 # not.  If we have built-in support (rts/Adjustor.c) then we use that,
 # otherwise we fall back on libffi, which is slightly slower.
-ArchHasAdjustorSupport=$(strip $(if $(findstring $(HostArch_CPP),i386 x86_64 powerpc,),YES,NO))
+ArchHasAdjustorSupport=$(strip $(if $(findstring $(HostArch_CPP),i386 x86_64,),YES,NO))
 ifeq "$(ArchHasAdjustorSupport)" "YES"
 UseLibFFIForAdjustors=NO
 else