diff --git a/mail/components/migration/src/Makefile.in b/mail/components/migration/src/Makefile.in
index 59ebc3e93fe3..74cbda2da7c5 100644
--- a/mail/components/migration/src/Makefile.in
+++ b/mail/components/migration/src/Makefile.in
@@ -35,9 +35,12 @@ CPPSRCS = \
 	nsMailProfileMigratorUtils.cpp \
 	nsNetscapeProfileMigratorBase.cpp \
 	nsSeamonkeyProfileMigrator.cpp \
-	nsDogbertProfileMigrator.cpp \
 	$(NULL)
 
+ifneq ($(OS_ARCH),BeOS)
+CPPSRCS += nsDogbertProfileMigrator.cpp
+endif
+
 ifeq ($(OS_ARCH),WINNT)
 CPPSRCS += \
 	nsProfileMigratorBase.cpp \