diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index c48d1a93ce3cb482629bdde94a5c13eccc18afa5..cf39c9e1cfe1bc002783de4df87f37bdbdfea414 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -54,7 +54,7 @@ SET_TARGET_PROPERTIES(${LIBRARY_NAME} PROPERTIES
   PREFIX ""
   LIBRARY_OUTPUT_NAME ${LIBRARY_NAME})
 
-SET_TARGET_PROPERTIES(${PROJECT_NAME} PROPERTIES SUFFIX "${PYTHON_EXT_SUFFIX}")
+SET_TARGET_PROPERTIES(${LIBRARY_NAME} PROPERTIES SUFFIX "${PYTHON_EXT_SUFFIX}")
 
 INSTALL(TARGETS ${LIBRARY_NAME}
   DESTINATION ${PYTHON_SITELIB})