diff --git a/ext/Setup b/ext/Setup
index be5f73a3c9..a10c724eeb 100644
--- a/ext/Setup
+++ b/ext/Setup
@@ -1,6 +1,8 @@
 #option nodynamic
 
 #Win32API
+#bigdecimal
+#bigdecimal/lib
 #curses
 #dbm
 #digest
diff --git a/ext/Setup.atheos b/ext/Setup.atheos
index 8f04f06a4b..b224b8608b 100644
--- a/ext/Setup.atheos
+++ b/ext/Setup.atheos
@@ -1,5 +1,7 @@
 option nodynamic
 
+bigdecimal
+bigdecimal/lib
 curses
 dbm
 digest
diff --git a/ext/Setup.dj b/ext/Setup.dj
index b6b5165bce..064f008f35 100644
--- a/ext/Setup.dj
+++ b/ext/Setup.dj
@@ -1,6 +1,8 @@
 option nodynamic
 
 #Win32API
+bigdecimal
+bigdecimal/lib
 #curses
 dbm
 digest
diff --git a/ext/Setup.emx b/ext/Setup.emx
index 90e1873702..0aba00e98f 100644
--- a/ext/Setup.emx
+++ b/ext/Setup.emx
@@ -1,6 +1,8 @@
 option nodynamic
 
 #Win32API
+bigdecimal
+bigdecimal/lib
 curses
 #dbm
 digest
diff --git a/ext/Setup.nt b/ext/Setup.nt
index 02638c8eab..0b3338312a 100644
--- a/ext/Setup.nt
+++ b/ext/Setup.nt
@@ -1,6 +1,8 @@
 #option nodynamic
 
 Win32API
+bigdecimal
+bigdecimal/lib
 #curses
 #dbm
 digest
diff --git a/ext/Setup.x68 b/ext/Setup.x68
index a5e4bc64bb..512c3bf82b 100644
--- a/ext/Setup.x68
+++ b/ext/Setup.x68
@@ -1,6 +1,8 @@
 option nodynamic
 
 #Win32API
+bigdecimal
+bigdecimal/lib
 #curses
 dbm
 digest