diff --git a/racket/src/bc/configure-parent.ac b/racket/src/bc/configure-parent.ac
index ccf4ef2a56..d73ac45a9f 100644
--- a/racket/src/bc/configure-parent.ac
+++ b/racket/src/bc/configure-parent.ac
@@ -46,7 +46,11 @@ if test "${enable_cgcdefault}" = "yes" ; then
 else
   MAIN_VARIANT=3m
 fi
-MAIN_MAKE_TARGET="${MAIN_VARIANT}"
+if test "${enable_csdefault}" = "yes" ; then
+  MAIN_MAKE_TARGET="racketcs"
+else
+  MAIN_MAKE_TARGET="${MAIN_VARIANT}"
+fi
 
 if test "${enable_racket}" != "" ; then
   RUN_RACKET="${enable_racket}"
diff --git a/racket/src/cfg-bc b/racket/src/cfg-bc
index b6e603300d..5c4f11d76e 100755
--- a/racket/src/cfg-bc
+++ b/racket/src/cfg-bc
@@ -2336,7 +2336,11 @@ if test "${enable_cgcdefault}" = "yes" ; then
 else
   MAIN_VARIANT=3m
 fi
-MAIN_MAKE_TARGET="${MAIN_VARIANT}"
+if test "${enable_csdefault}" = "yes" ; then
+  MAIN_MAKE_TARGET="racketcs"
+else
+  MAIN_MAKE_TARGET="${MAIN_VARIANT}"
+fi
 
 if test "${enable_racket}" != "" ; then
   RUN_RACKET="${enable_racket}"
diff --git a/racket/src/cfg-cs b/racket/src/cfg-cs
index 22b669c62a..fe2134449c 100755
--- a/racket/src/cfg-cs
+++ b/racket/src/cfg-cs
@@ -2240,6 +2240,8 @@ fi
 RUN_LOCAL_RACKET="local/cs/c/racketcs"
 CONFIGURE_LOCAL_RACKET=--enable-cs
 
+# If BC is the default, then we rely on BC configure-parent
+# being used instead of this one:
 MAIN_MAKE_TARGET=racketcs
 MAIN_VARIANT=3m
 
diff --git a/racket/src/cs/c/configure-parent.ac b/racket/src/cs/c/configure-parent.ac
index ff6132d425..4c3f82c198 100644
--- a/racket/src/cs/c/configure-parent.ac
+++ b/racket/src/cs/c/configure-parent.ac
@@ -31,6 +31,8 @@ fi
 RUN_LOCAL_RACKET="local/cs/c/racketcs"
 CONFIGURE_LOCAL_RACKET=--enable-cs
 
+# If BC is the default, then we rely on BC configure-parent
+# being used instead of this one:
 MAIN_MAKE_TARGET=racketcs
 MAIN_VARIANT=3m