diff --git a/Ghidra/Processors/8051/data/languages/8051.cspec b/Ghidra/Processors/8051/data/languages/8051.cspec
index 67911b49c8..ab1b88383f 100644
--- a/Ghidra/Processors/8051/data/languages/8051.cspec
+++ b/Ghidra/Processors/8051/data/languages/8051.cspec
@@ -10,7 +10,7 @@
   </global>
   <stackpointer register="SP" space="INTMEM" growth="positive"/>
   <default_proto>
-    <prototype name="__stdcall" extrapop="2" stackshift="2" strategy="register">
+    <prototype name="__stdcall" extrapop="-2" stackshift="-2" strategy="register">
       <input>
         <pentry minsize="1" maxsize="1">
           <register name="ACC"/>
diff --git a/Ghidra/Processors/8085/data/languages/8085.cspec b/Ghidra/Processors/8085/data/languages/8085.cspec
index 6f98c13568..cfd08b5c40 100644
--- a/Ghidra/Processors/8085/data/languages/8085.cspec
+++ b/Ghidra/Processors/8085/data/languages/8085.cspec
@@ -6,7 +6,7 @@
   </global>
   <stackpointer register="SP" space="ram" growth="negative"/>
   <default_proto>
-    <prototype name="__stdcall" extrapop="-2" stackshift="-2">
+    <prototype name="__stdcall" extrapop="2" stackshift="2">
       <input>
         <pentry minsize="1" maxsize="1">
           <register name="A"/>
diff --git a/Ghidra/Processors/Toy/data/languages/toyPosStack.cspec b/Ghidra/Processors/Toy/data/languages/toyPosStack.cspec
index 297fbaf2d7..795ba37e3a 100644
--- a/Ghidra/Processors/Toy/data/languages/toyPosStack.cspec
+++ b/Ghidra/Processors/Toy/data/languages/toyPosStack.cspec
@@ -6,7 +6,7 @@
   </global>
   <stackpointer register="sp" space="ram" growth="positive"/>
   <default_proto>
-    <prototype name="__stdcall" extrapop="unknown" stackshift="4">
+    <prototype name="__stdcall" extrapop="unknown" stackshift="-4">
       <input>
         <pentry minsize="1" maxsize="4">
           <register name="r12"/>