diff --git a/gcc7.patch b/gcc7.patch
new file mode 100644
index 0000000..3e56782
--- /dev/null
+++ b/gcc7.patch
@@ -0,0 +1,42 @@
+--- winpthreads/src/libgcc/dll_math.c	2013-04-10 20:11:34.000000000 +0200
++++ winpthreads/src/libgcc/dll_math.c	2017-05-31 13:02:25.869883546 +0200
+@@ -120,6 +120,7 @@
+ u_quad_t	__udivdi3(u_quad_t a, u_quad_t b);
+ u_quad_t	__umoddi3(u_quad_t a, u_quad_t b);
+ int		__ucmpdi2(u_quad_t a, u_quad_t b);
++quad_t __divmoddi4(quad_t a, quad_t b, quad_t *rem);
+ 
+ #endif /* !_LIBKERN_QUAD_H_ */
+ 
+@@ -546,6 +547,31 @@
+ 	(void)__qdivrem(a, b, &r);
+ 	return (r);
+ }
++
++/*
++ * Divide two signed quads.
++ * This function is new in GCC 7.
++ */
++quad_t
++__divmoddi4(a, b, rem)
++       quad_t a, b, *rem;
++{
++       u_quad_t ua, ub, uq, ur;
++       int negq, negr;
++
++       if (a < 0)
++               ua = -(u_quad_t)a, negq = 1, negr = 1;
++       else
++               ua = a, negq = 0, negr = 0;
++       if (b < 0)
++               ub = -(u_quad_t)b, negq ^= 1;
++       else
++               ub = b;
++       uq = __qdivrem(ua, ub, &ur);
++       if (rem)
++               *rem = (negr ? -ur : ur);
++       return (negq ? -uq : uq);
++}
+ #else
+ static int __attribute__((unused)) dummy;
+ #endif /*deined (_X86_) && !defined (__x86_64__)*/