diff --git a/Ghidra/Processors/PowerPC/data/languages/ppc_32_be_Mac.cspec b/Ghidra/Processors/PowerPC/data/languages/ppc_32_be_Mac.cspec
index 4029a5b616..996d8906c1 100644
--- a/Ghidra/Processors/PowerPC/data/languages/ppc_32_be_Mac.cspec
+++ b/Ghidra/Processors/PowerPC/data/languages/ppc_32_be_Mac.cspec
@@ -42,6 +42,7 @@
         </pentry>
       </output>
       <unaffected>
+        <register name="r13"/>
         <register name="r14"/>
         <register name="r15"/>
         <register name="r16"/>
diff --git a/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_be.cspec b/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_be.cspec
index ab242c7e65..2703acccd2 100644
--- a/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_be.cspec
+++ b/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_be.cspec
@@ -45,6 +45,8 @@
         </pentry>
       </output>
       <unaffected>
+        <register name="r2"/>  <!-- _SDA2_BASE_ -->
+        <register name="r13"/> <!-- _SDA_BASE_  -->
         <register name="r14"/>
         <register name="r15"/>
         <register name="r16"/>
diff --git a/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_le.cspec b/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_le.cspec
index 616161e5a9..d7f8752597 100644
--- a/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_le.cspec
+++ b/Ghidra/Processors/PowerPC/data/languages/ppc_32_e500_le.cspec
@@ -45,6 +45,8 @@
         </pentry>
       </output>
       <unaffected>
+        <register name="r2"/>  <!-- _SDA2_BASE_ -->
+        <register name="r13"/> <!-- _SDA_BASE_  -->
         <register name="r14"/>
         <register name="r15"/>
         <register name="r16"/>