--- a/src/ai/api/ai_industry.cpp	Tue Mar 20 11:42:07 2007 +0000
+++ b/src/ai/api/ai_industry.cpp	Tue Mar 20 11:55:30 2007 +0000
@@ -18,7 +18,7 @@
 	return ::GetNumIndustries();
 }
 
-bool AIIndustry::IsValidIndustry(IndustryID industry_id)
+/* static */ bool AIIndustry::IsValidIndustry(IndustryID industry_id)
 {
 	return ::IsValidIndustryID(industry_id);
 }