diff --git a/slothy/targets/arm_v7m/arch_v7m.py b/slothy/targets/arm_v7m/arch_v7m.py
index 38b32ee34..482b561c4 100644
--- a/slothy/targets/arm_v7m/arch_v7m.py
+++ b/slothy/targets/arm_v7m/arch_v7m.py
@@ -1854,7 +1854,6 @@ def make(cls, src):
         obj.increment = None
         obj.pre_index = 0
         obj.addr = obj.args_in[0]
-        obj.args_in_out_different = [(0, 0)]  # Can't have Rd==Ra
         return obj
 
     def write(self):
@@ -1875,7 +1874,6 @@ def make(cls, src):
         obj.increment = None
         obj.pre_index = obj.immediate
         obj.addr = obj.args_in[0]
-        obj.args_in_out_different = [(0, 0)]  # Can't have Rd==Ra
         return obj
 
     def write(self):
@@ -1900,7 +1898,6 @@ def make(cls, src):
         obj = Armv7mInstruction.build(cls, src)
         obj.increment = None
         obj.pre_index = obj.immediate
-        obj.args_in_out_different = [(0, 0)]  # Can't have Rd==Ra
         obj.addr = obj.args_in[0]
         return obj
 
@@ -1919,7 +1916,6 @@ def make(cls, src):
         obj = Armv7mInstruction.build(cls, src)
         obj.increment = None
         obj.pre_index = obj.immediate
-        obj.args_in_out_different = [(0, 0)]  # Can't have Rd==Ra
         obj.addr = obj.args_in[0]
         return obj