diff --git a/config.mak.in b/config.mak.in
index 7170729..ea7705c 100644
--- a/config.mak.in
+++ b/config.mak.in
@@ -51,3 +51,4 @@
 NO_DEFLATE_BOUND=@NO_DEFLATE_BOUND@
 FREAD_READS_DIRECTORIES=@FREAD_READS_DIRECTORIES@
 SNPRINTF_RETURNS_BOGUS=@SNPRINTF_RETURNS_BOGUS@
+PTHREAD_LIBS=@PTHREAD_LIBS@