diff --git a/ports/boost/CONTROL b/ports/boost/CONTROL
index ca9ae9ac1a..3f1127ab01 100644
--- a/ports/boost/CONTROL
+++ b/ports/boost/CONTROL
@@ -1,4 +1,4 @@
 Source: boost
-Version: 1.63-1
+Version: 1.63-2
 Description: Peer-reviewed portable C++ source libraries
 Build-Depends: zlib, bzip2
diff --git a/ports/boost/portfile.cmake b/ports/boost/portfile.cmake
index c4183d3188..343e0c5b05 100644
--- a/ports/boost/portfile.cmake
+++ b/ports/boost/portfile.cmake
@@ -163,7 +163,9 @@ function(boost_rename_libs LIBS)
         string(REPLACE "-s-" "-" NEW_FILENAME ${NEW_FILENAME}) # For Release libs
         string(REPLACE "-vc141-" "-vc140-" NEW_FILENAME ${NEW_FILENAME}) # To merge VS2017 and VS2015 binaries
         string(REPLACE "-sgd-" "-gd-" NEW_FILENAME ${NEW_FILENAME}) # For Debug libs
-        if (EXISTS ${DIRECTORY_OF_LIB_FILE}/${NEW_FILENAME})
+        if ("${DIRECTORY_OF_LIB_FILE}/${NEW_FILENAME}" STREQUAL "${DIRECTORY_OF_LIB_FILE}/${OLD_FILENAME}")
+            # nothing to do
+        elseif (EXISTS ${DIRECTORY_OF_LIB_FILE}/${NEW_FILENAME})
             file(REMOVE ${DIRECTORY_OF_LIB_FILE}/${OLD_FILENAME})
         else()
             file(RENAME ${DIRECTORY_OF_LIB_FILE}/${OLD_FILENAME} ${DIRECTORY_OF_LIB_FILE}/${NEW_FILENAME})