diff --git a/Source/build.cpp b/Source/build.cpp
index 660ed314..60fb98e9 100644
--- a/Source/build.cpp
+++ b/Source/build.cpp
@@ -1147,6 +1147,7 @@ int CEXEBuild::write_output(void)
   if (resolve_call_int("install callback",".callbacks",ns_func.find(".onNextPage",0),&build_header.common.code_onNextPage)) return PS_ERROR;
   if (resolve_call_int("install callback",".callbacks",ns_func.find(".onPrevPage",0),&build_header.code_onPrevPage)) return PS_ERROR;
   if (resolve_call_int("install callback",".callbacks",ns_func.find(".onInitDialog",0),&build_header.common.code_onInitDialog)) return PS_ERROR;
+  if (resolve_call_int("install callback",".callbacks",ns_func.find(".onMouseOverSection",0),&build_header.code_onMouseOverSection)) return PS_ERROR;
 #ifdef NSIS_CONFIG_COMPONENTPAGE
   if (resolve_call_int("install callback",".callbacks",ns_func.find(".onSelChange",0),&build_header.code_onSelChange)) return PS_ERROR;
 #endif//NSIS_CONFIG_COMPONENTPAGE