diff --git a/doc/build-osx.md b/doc/build-osx.md
index c41820f2b..491c5c468 100644
--- a/doc/build-osx.md
+++ b/doc/build-osx.md
@@ -38,7 +38,7 @@ Instructions: Homebrew
 
 #### Install dependencies using Homebrew
 
-        brew install autoconf automake libtool boost miniupnpc openssl pkg-config protobuf qt
+        brew install autoconf automake libtool boost miniupnpc openssl pkg-config protobuf qt gmp
 
 #### Installing berkeley-db4 using Homebrew