diff --git a/Mk/bsd.port.mk b/Mk/bsd.port.mk
--- a/Mk/bsd.port.mk
+++ b/Mk/bsd.port.mk
@@ -1486,13 +1486,13 @@
 .    endfor
 .    for f in ${USES}
 .undef _usefound
-.      for udir in ${OVERLAYS:C,$,/Mk/Uses,} ${USESDIR}
-_usefile=	${udir}/${f:C/\:.*//}.mk
-.        if exists(${_usefile}) && !defined(_usefound)
+.      if exists(${OVERLAYS:C,$,/Mk/Uses,}/${f:C/\:.*//}.mk) && !defined(_usefound)
 _usefound=
-.include "${_usefile}"
-.        endif
-.      endfor
+.include "${OVERLAYS:C,$,/Mk/Uses,}/${f:C/\:.*//}.mk"
+.      elif exists(${USESDIR}/${f:C/\:.*//}.mk) && !defined(_usefound)
+_usefound=
+.include "${USESDIR}/${f:C/\:.*//}.mk"
+.      endif
 .      if !defined(_usefound)
 ERROR+=	"Unknown USES=${f:C/\:.*//}"
 .      endif
@@ -1991,13 +1991,13 @@
 .    endfor
 .    for f in ${_USES_POST}
 .undef _usefound
-.      for udir in ${OVERLAYS:C,$,/Mk/Uses,} ${USESDIR}
-_usefile=	${udir}/${f:C/\:.*//}.mk
-.        if exists(${_usefile}) && !defined(_usefound)
+.      if exists(${OVERLAYS:C,$,/Mk/Uses,}/${f:C/\:.*//}.mk) && !defined(_usefound)
 _usefound=
-.include "${_usefile}"
-.        endif
-.      endfor
+.include "${OVERLAYS:C,$,/Mk/Uses,}/${f:C/\:.*//}.mk"
+.      elif exists(${USESDIR}/${f:C/\:.*//}.mk) && !defined(_usefound)
+_usefound=
+.include "${USESDIR}/${f:C/\:.*//}.mk"
+.      endif
 .      if !defined(_usefound)
 ERROR+=	"Unknown USES=${f:C/\:.*//}"
 .      endif