diff --git Mk/Uses/pyqt.mk Mk/Uses/pyqt.mk
index 0b478cb6a117..5ad06b2a0106 100644
--- Mk/Uses/pyqt.mk
+++ Mk/Uses/pyqt.mk
@@ -217,7 +217,7 @@ _QMLDIR_REL=		${QT_QMLDIR_REL}/${_VERSION_SUBDIR_REL}
 PYQT_APIDIR=		${PREFIX}/${_APIDIR_REL}
 PYQT_DOCDIR=		${PREFIX}/${_DOCDIR_REL}
 PYQT_EXAMPLEDIR=	${PREFIX}/${_EXAMPLEDIR_REL}
-PYQT_SIPDIR=		${PREFIX}/${_SIPDIR_REL}
+PYQT_SIPDIR?=		${PREFIX}/${_SIPDIR_REL}
 PYQT_DESIGNERDIR=	${PREFIX}/${_DESIGNERDIR_REL}
 PYQT_QMLDIR=		${PREFIX}/${_QMLDIR_REL}
 
diff --git devel/py-sip/Makefile devel/py-sip/Makefile
index 2e434eea6e1c..dd16914accf6 100644
--- devel/py-sip/Makefile
+++ devel/py-sip/Makefile
@@ -36,6 +36,8 @@ CONFIGURE_WRKSRC=	${WRKSRC}/default
 BUILD_WRKSRC=		${CONFIGURE_WRKSRC}
 INSTALL_WRKSRC=		${CONFIGURE_WRKSRC}
 
+PYQT_SIPDIR=	${LOCALBASE}/share/PyQt5/${PYTHON_VER}/sip
+
 do-configure:
 	# The default sip 'flavor'
 	${MKDIR} ${CONFIGURE_WRKSRC} &&  \