diff --git a/src/Makefile.am b/src/Makefile.am
index e6c1fbb14..f31a394f6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -302,6 +302,7 @@ libbitcoin_server_a_SOURCES = \
   cc/fsm.cpp \
   cc/heir.cpp \
   cc/oracles.cpp \
+  mini-gmp.c \
   cc/prices.cpp \
   cc/pegs.cpp \
   cc/marmara.cpp \