diff --git a/build/jam/FileRules b/build/jam/FileRules
index b71e0eeef7..885f7b6b23 100644
--- a/build/jam/FileRules
+++ b/build/jam/FileRules
@@ -247,7 +247,7 @@ rule CopySetHaikuRevision target : source
 actions CopySetHaikuRevision1
 {
 	$(HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR)
-	revision=`(LANG=C svn info $(HAIKU_TOP) 2> /dev/null || echo Revision: 0) |
+	revision=`(LC_ALL=C LANG=C svn info $(HAIKU_TOP) 2> /dev/null || echo Revision: 0) |
 		grep Revision | awk '{printf $2}'`
 	$(2[1]) --data $(2[3]) $(1) &&
 	$(2[2]) $(1) ${revision}