diff --git a/racket/src/ac/path.m4 b/racket/src/ac/path.m4
index d1669a43a3..1f3dfccd84 100644
--- a/racket/src/ac/path.m4
+++ b/racket/src/ac/path.m4
@@ -1,6 +1,6 @@
 
 unixstyle=no
-if test "${enable_useprefix}" = "yes" -a "${prefix}" != "NONE" ; then
+if test "${enable_origtree}" != "yes" -a "${enable_useprefix}" != "no" ; then
   if test "${prefix}" != "NONE" ; then
     unixstyle=yes
   fi
diff --git a/racket/src/cfg-cs b/racket/src/cfg-cs
index 14f12cebfb..58922c933d 100755
--- a/racket/src/cfg-cs
+++ b/racket/src/cfg-cs
@@ -2038,7 +2038,7 @@ fi
 
 
 unixstyle=no
-if test "${enable_useprefix}" = "yes" -a "${prefix}" != "NONE" ; then
+if test "${enable_origtree}" != "yes" -a "${enable_useprefix}" != "no" ; then
   if test "${prefix}" != "NONE" ; then
     unixstyle=yes
   fi
diff --git a/racket/src/cfg-racket b/racket/src/cfg-racket
index fa17fc2b33..8ff7d1e52f 100755
--- a/racket/src/cfg-racket
+++ b/racket/src/cfg-racket
@@ -3019,7 +3019,7 @@ fi
 
 
 unixstyle=no
-if test "${enable_useprefix}" = "yes" -a "${prefix}" != "NONE" ; then
+if test "${enable_origtree}" != "yes" -a "${enable_useprefix}" != "no" ; then
   if test "${prefix}" != "NONE" ; then
     unixstyle=yes
   fi
diff --git a/racket/src/cs/c/configure b/racket/src/cs/c/configure
index 331c72ae8f..18ce43f039 100755
--- a/racket/src/cs/c/configure
+++ b/racket/src/cs/c/configure
@@ -2915,7 +2915,7 @@ PREFIX_PATH_RELATIVE=/../..
 
 
 unixstyle=no
-if test "${enable_useprefix}" = "yes" -a "${prefix}" != "NONE" ; then
+if test "${enable_origtree}" != "yes" -a "${enable_useprefix}" != "no" ; then
   if test "${prefix}" != "NONE" ; then
     unixstyle=yes
   fi