diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 2a35363c863..2eb3f27155a 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-06  Iain Sandoe  <iain@sandoe.co.uk>
+
+	* config/rs6000/t-darwin: Ensure that the unwinder is built with
+	altivec enabled.
+
 2019-06-06  Jozef Lawrynowicz  <jozef.l@mittosystems.com>
 
 	* config/msp430/slli.S (__mspabi_slli_n): Put function in its own
diff --git a/libgcc/config/rs6000/t-darwin b/libgcc/config/rs6000/t-darwin
index abb41fc9bce..61da0bdf13a 100644
--- a/libgcc/config/rs6000/t-darwin
+++ b/libgcc/config/rs6000/t-darwin
@@ -20,4 +20,7 @@ LIB2ADD_ST = \
 # earlier OSX versions.
 HOST_LIBGCC2_CFLAGS += -Wa,-force_cpusubtype_ALL -mmacosx-version-min=10.4
 
+unwind-dw2_s.o: HOST_LIBGCC2_CFLAGS += -maltivec
+unwind-dw2.o: HOST_LIBGCC2_CFLAGS += -maltivec
+
 LIB2ADDEH += $(srcdir)/config/rs6000/darwin-fallback.c