diff --git a/debian/patches/af132734b6f22d097edb890422158031e588824e.diff b/debian/patches/af132734b6f22d097edb890422158031e588824e.diff
new file mode 100644
index 0000000000..719a11daec
--- /dev/null
+++ b/debian/patches/af132734b6f22d097edb890422158031e588824e.diff
@@ -0,0 +1,89 @@
+diff --git a/mono/mini/unwind.c b/mono/mini/unwind.c
+index 712295c..6d60f79 100644
+--- a/mono/mini/unwind.c
++++ b/mono/mini/unwind.c
+@@ -80,13 +80,17 @@ static int map_hw_reg_to_dwarf_reg [] = { 0, 1, 2, 3, 5, 4, 6, 7, 8 };
+ #define DWARF_PC_REG (mono_hw_reg_to_dwarf_reg (X86_NREG))
+ #elif defined (TARGET_POWERPC)
+ // http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html
+-static int map_hw_reg_to_dwarf_reg [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 
++static int map_hw_reg_to_dwarf_reg [ppc_lr + 1] = { 0, 1, 2, 3, 4, 5, 6, 7, 8,
+ 										  9, 10, 11, 12, 13, 14, 15, 16,
+ 										  17, 18, 19, 20, 21, 22, 23, 24,
+ 										  25, 26, 27, 28, 29, 30, 31 };
+-#define NUM_DWARF_REGS 110
+ #define DWARF_DATA_ALIGN (-(gint32)sizeof (mgreg_t))
++#if _CALL_ELF == 2
++#define DWARF_PC_REG 65
++#else
+ #define DWARF_PC_REG 108
++#endif
++#define NUM_DWARF_REGS (DWARF_PC_REG + 1)
+ #elif defined (TARGET_S390X)
+ static int map_hw_reg_to_dwarf_reg [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
+ #define NUM_DWARF_REGS 16
+@@ -117,9 +121,20 @@ static int map_hw_reg_to_dwarf_reg [16];
+ #endif
+ 
+ static gboolean dwarf_reg_to_hw_reg_inited;
++static gboolean hw_reg_to_dwarf_reg_inited;
+ 
+ static int map_dwarf_reg_to_hw_reg [NUM_DWARF_REGS];
+ 
++static void
++init_hw_reg_map (void)
++{
++#ifdef TARGET_POWERPC
++	map_hw_reg_to_dwarf_reg [ppc_lr] = DWARF_PC_REG;
++#endif
++	mono_memory_barrier ();
++	hw_reg_to_dwarf_reg_inited = TRUE;
++}
++
+ /*
+  * mono_hw_reg_to_dwarf_reg:
+  *
+@@ -128,12 +143,8 @@ static int map_dwarf_reg_to_hw_reg [NUM_DWARF_REGS];
+ int
+ mono_hw_reg_to_dwarf_reg (int reg)
+ {
+-#ifdef TARGET_POWERPC
+-	if (reg == ppc_lr)
+-		return 108;
+-	else
+-		g_assert (reg < NUM_HW_REGS);
+-#endif
++	if (!hw_reg_to_dwarf_reg_inited)
++		init_hw_reg_map ();
+ 
+ 	if (NUM_HW_REGS == 0) {
+ 		g_assert_not_reached ();
+@@ -144,7 +155,7 @@ mono_hw_reg_to_dwarf_reg (int reg)
+ }
+ 
+ static void
+-init_reg_map (void)
++init_dwarf_reg_map (void)
+ {
+ 	int i;
+ 
+@@ -153,10 +164,6 @@ init_reg_map (void)
+ 		map_dwarf_reg_to_hw_reg [mono_hw_reg_to_dwarf_reg (i)] = i;
+ 	}
+ 
+-#ifdef TARGET_POWERPC
+-	map_dwarf_reg_to_hw_reg [DWARF_PC_REG] = ppc_lr;
+-#endif
+-
+ 	mono_memory_barrier ();
+ 	dwarf_reg_to_hw_reg_inited = TRUE;
+ }
+@@ -165,7 +172,7 @@ int
+ mono_dwarf_reg_to_hw_reg (int reg)
+ {
+ 	if (!dwarf_reg_to_hw_reg_inited)
+-		init_reg_map ();
++		init_dwarf_reg_map ();
+ 
+ 	return map_dwarf_reg_to_hw_reg [reg];
+ }
diff --git a/debian/patches/series b/debian/patches/series
new file mode 100644
index 0000000000..19f8c6d70f
--- /dev/null
+++ b/debian/patches/series
@@ -0,0 +1 @@
+af132734b6f22d097edb890422158031e588824e.diff