diff --git a/configure.ac b/configure.ac
index 3df579a00..67ef3c24a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1035,12 +1035,14 @@ AM_CONDITIONAL(SCREENSAVER, [test "x$SCREENSAVER" = xyes])
 if test "x$SCREENSAVER" = xyes; then
 	AC_DEFINE(SCREENSAVER, 1, [Support MIT-SCREEN-SAVER extension])
 	REQUIRED_MODULES="$REQUIRED_MODULES $SCRNSAVERPROTO"
+	SDK_REQUIRED_MODULES="$SDK_REQUIRED_MODULES $SCRNSAVERPROTO"
 fi
 
 AM_CONDITIONAL(RES, [test "x$RES" = xyes])
 if test "x$RES" = xyes; then
 	AC_DEFINE(RES, 1, [Support X resource extension])
 	REQUIRED_MODULES="$REQUIRED_MODULES $RESOURCEPROTO"
+	SDK_REQUIRED_MODULES="$SDK_REQUIRED_MODULES $RESOURCEPROTO"
 fi
 
 # The XRes extension may support client ID tracking only if it has
@@ -1184,6 +1186,7 @@ AM_CONDITIONAL(XF86BIGFONT, [test "x$XF86BIGFONT" = xyes])
 if test "x$XF86BIGFONT" = xyes; then
 	AC_DEFINE(XF86BIGFONT, 1, [Support XF86 Big font extension])
 	REQUIRED_MODULES="$REQUIRED_MODULES $BIGFONTPROTO"
+	SDK_REQUIRED_MODULES="$SDK_REQUIRED_MODULES $BIGFONTPROTO"
 fi
 
 AM_CONDITIONAL(DPMSExtension, [test "x$DPMSExtension" = xyes])