diff --git a/cmake/Version.cmake b/cmake/Version.cmake
index 17315d07..8f9b4555 100644
--- a/cmake/Version.cmake
+++ b/cmake/Version.cmake
@@ -82,7 +82,7 @@ add_definitions (-DSYNERGY_VERSION="${SYNERGY_VERSION}")
 add_definitions (-DSYNERGY_VERSION_STRING="${SYNERGY_VERSION_STRING}")
 add_definitions (-DSYNERGY_REVISION="${SYNERGY_REVISION}")
 add_definitions (-DSYNERGY_BUILD_DATE="${SYNERGY_BUILD_DATE}")
-add_definitions (-DSYNERGY_BUILD_NUMBER=${SYNERGY_BUILD_NUMBER})
+add_definitions (-DSYNERGY_BUILD_NUMBER="${SYNERGY_BUILD_NUMBER}")
 
 if (SYNERGY_DEVELOPER_MODE)
     add_definitions (-DSYNERGY_DEVELOPER_MODE=1)