diff --git a/math/py-topologic/Makefile b/math/py-topologic/Makefile
index 6b4bd28035df..9e2a33a2e384 100644
--- a/math/py-topologic/Makefile
+++ b/math/py-topologic/Makefile
@@ -1,37 +1,37 @@
 PORTNAME=	topologic
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.5.0-21
 DISTVERSIONSUFFIX=	-gae5ad5d
 CATEGORIES=	math
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 PKGNAMESUFFIX=	-space-modeling-library
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Library for topological representations of architectural spaces
 
 LICENSE=	AGPLv3
 LICENSE_FILE=	${WRKSRC}/../LICENSE
 
 LIB_DEPENDS=	libTopologicCore.so:math/topologic \
 		libTKernel.so:cad/opencascade
 
 USES=		cmake compiler:c++17-lang localbase:ldflags python
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	wassimj
 GH_PROJECT=	Topologic
 
 WRKSRC_SUBDIR=	Python-Bindings
 
 CXXFLAGS+=	-I${LOCALBASE}/include/OpenCASCADE
 
 PLIST_FILES=	${PYTHON_SITELIBDIR}/topologic${PYTHON_EXT_SUFFIX}.so
 
 do-install: # workaround for https://github.com/wassimj/Topologic/issues/34
 	${MKDIR} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
-	${INSTALL_LIB} ${BUILD_WRKSRC}/topologic.cpython-38.so ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
+	${INSTALL_LIB} ${BUILD_WRKSRC}/topologic${PYTHON_EXT_SUFFIX}.so ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 
 do-test: install
 	${PYTHON_CMD} ${WRKSRC}/test/topologictest01.py
 
 .include <bsd.port.mk>