diff --git a/doc/build-unix.md b/doc/build-unix.md
--- a/doc/build-unix.md
+++ b/doc/build-unix.md
@@ -81,8 +81,7 @@
 
 BerkeleyDB 5.3 or later is required for the wallet. This can be installed with:
 
-        sudo apt-get install libdb-dev
-        sudo apt-get install libdb++-dev
+        sudo apt-get install libdb-dev libdb++-dev
 
 See the section "Disable-wallet mode" to build Bitcoin ABC without wallet.