diff --git a/math/octave-devel/Makefile b/math/octave-devel/Makefile
index f4d0ed69df08..489e2ce8cbbb 100644
--- a/math/octave-devel/Makefile
+++ b/math/octave-devel/Makefile
@@ -39,7 +39,7 @@ CONFIGURE_ARGS=	--disable-shared --with-fftw --host=${GNU_HOST}
 CONFIGURE_ARGS+=	--with-f2c
 .endif
 
-.if ${OSVERSION} <= 470101
+.if ${OSVERSION} < 500000
 CONFIGURE_ARGS+=	--disable-readline
 .endif
 
diff --git a/math/octave/Makefile b/math/octave/Makefile
index f4d0ed69df08..489e2ce8cbbb 100644
--- a/math/octave/Makefile
+++ b/math/octave/Makefile
@@ -39,7 +39,7 @@ CONFIGURE_ARGS=	--disable-shared --with-fftw --host=${GNU_HOST}
 CONFIGURE_ARGS+=	--with-f2c
 .endif
 
-.if ${OSVERSION} <= 470101
+.if ${OSVERSION} < 500000
 CONFIGURE_ARGS+=	--disable-readline
 .endif