diff --git a/src/template/linux b/src/template/linux
index 2a3209ccb0..44b046033a 100644
--- a/src/template/linux
+++ b/src/template/linux
@@ -3,7 +3,7 @@ CFLAGS=-O2
 CPPFLAGS="-D_GNU_SOURCE"
 
 THREAD_SUPPORT=yes
-NEED_REENTRANT_FUNCS=yes
+NEED_REENTRANT_FUNCS=yes	# Debian kernel 2.2 2003-09-27
 THREAD_CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS"
 THREAD_LIBS="-lpthread"