diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 1d9f1d6..fd22455 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -14,3 +14,16 @@
 add_subdirectory(network)
 add_subdirectory(Xregion)
 add_subdirectory(rfb)
+
+# For any convenience libraries that are linked into libvnc.so, we need to
+# explicitly build their corresponding sources using PIC.  WIN32 is excluded
+# because PIC code does not exist on that platform and MinGW complains if -fPIC
+# is passed (additionally, libvnc is not used on Windows.)
+
+if(CMAKE_COMPILER_IS_GNUCXX AND (CMAKE_SIZEOF_VOID_P MATCHES 8) AND NOT WIN32)
+  set_target_properties(os rdr network Xregion rfb
+    PROPERTIES COMPILE_FLAGS -fPIC)
+  if(USE_INCLUDED_ZLIB)
+    set_target_properties(zlib PROPERTIES COMPILE_FLAGS -fPIC)
+  endif()
+endif()