diff --git a/math/py-cypari2/Makefile b/math/py-cypari2/Makefile
index e1e64d898703..e9a3367a3775 100644
--- a/math/py-cypari2/Makefile
+++ b/math/py-cypari2/Makefile
@@ -3,7 +3,7 @@
 
 PORTNAME=	cypari2
 DISTVERSION=	2.1.1
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	math python
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
diff --git a/math/py-cypari2/files/patch-cypari2_gen.pyx b/math/py-cypari2/files/patch-cypari2_gen.pyx
new file mode 100644
index 000000000000..484e5a5f0d26
--- /dev/null
+++ b/math/py-cypari2/files/patch-cypari2_gen.pyx
@@ -0,0 +1,11 @@
+--- cypari2/gen.pyx.orig	2019-04-23 10:57:51 UTC
++++ cypari2/gen.pyx
+@@ -4109,7 +4109,7 @@ cdef class Gen(Gen_base):
+         non-constant polynomial, or False if f is reducible or constant.
+         """
+         sig_on()
+-        t = isirreducible(self.g)
++        t = polisirreducible(self.g)
+         clear_stack()
+         return t != 0
+ 
diff --git a/math/py-cypari2/files/patch-cypari2_paridecl.pxd b/math/py-cypari2/files/patch-cypari2_paridecl.pxd
new file mode 100644
index 000000000000..c01ae1f8a0ac
--- /dev/null
+++ b/math/py-cypari2/files/patch-cypari2_paridecl.pxd
@@ -0,0 +1,11 @@
+--- cypari2/paridecl.pxd.orig	2019-04-23 10:57:51 UTC
++++ cypari2/paridecl.pxd
+@@ -3850,7 +3850,7 @@ cdef extern from *:     # PARI headers already include
+     GEN     glcm0(GEN x, GEN y)
+     GEN     gp_factor0(GEN x, GEN flag)
+     GEN     idealfactorback(GEN nf, GEN L, GEN e, int red)
+-    long    isirreducible(GEN x)
++    long    polisirreducible "isirreducible"(GEN x)
+     GEN     newtonpoly(GEN x, GEN p)
+     GEN     nffactorback(GEN nf, GEN L, GEN e)
+     GEN     nfrootsQ(GEN x)