diff --git a/ports/libpqxx/CMakeLists.txt b/ports/libpqxx/CMakeLists.txt
index a3e6ae3f484..00575c4afae 100644
--- a/ports/libpqxx/CMakeLists.txt
+++ b/ports/libpqxx/CMakeLists.txt
@@ -34,7 +34,9 @@ file(GLOB SRCS "${PROJECT_SOURCE_DIR}/src/*.cxx")
 if(BUILD_SHARED_LIBS)
     set(TARGET libpqxx)
     set(SHARED_DEFINITION -DPQXX_SHARED)
-    list(APPEND SRCS "${PROJECT_SOURCE_DIR}/win32/libpqxx.cxx")
+    if(MSVC)
+        list(APPEND SRCS "${PROJECT_SOURCE_DIR}/win32/libpqxx.cxx")
+    endif()
 else()
     set(TARGET libpqxx_static)
     set(SHARED_DEFINITION "")
diff --git a/ports/libpqxx/CONTROL b/ports/libpqxx/CONTROL
index 9acdf814655..f118a488b8b 100644
--- a/ports/libpqxx/CONTROL
+++ b/ports/libpqxx/CONTROL
@@ -1,5 +1,5 @@
 Source: libpqxx
-Version: 6.4.5-2
+Version: 6.4.5-3
 Homepage: https://github.com/jtv/libpqxx
 Description: The official C++ client API for PostgreSQL
 Build-Depends: libpq[core]