diff --git a/src/cdecl_c_if97.rs b/src/cdecl_c_if97.rs
index dc4401d..7911aac 100644
--- a/src/cdecl_c_if97.rs
+++ b/src/cdecl_c_if97.rs
@@ -62,7 +62,6 @@ pub unsafe extern "C" fn px(p: f64, x: f64, o_id: i32) -> f64 {
     match o_id {
         OP => return p,
         OX => return x,
-        OT => return px_reg4(p, x, o_id),
         _ => return px_reg4(p, x, o_id),
     }
 }
diff --git a/src/python_if97.rs b/src/python_if97.rs
index 8226af9..cd57e35 100644
--- a/src/python_if97.rs
+++ b/src/python_if97.rs
@@ -59,7 +59,6 @@ fn px(p: f64, x: f64, o_id: i32) -> f64 {
     match o_id {
         OP => return p,
         OX => return x,
-        OT => return px_reg4(p, x, o_id),
         _ => return px_reg4(p, x, o_id),
     }
 }
diff --git a/src/rust_if97.rs b/src/rust_if97.rs
index 62303b0..615e31b 100644
--- a/src/rust_if97.rs
+++ b/src/rust_if97.rs
@@ -187,7 +187,6 @@ pub fn px(p: f64, x: f64, o_id: i32) -> f64 {
     match o_id {
         OP => return p,
         OX => return x,
-        OT => return px_reg4(p, x, o_id),
         _ => return px_reg4(p, x, o_id),
     }
 }
diff --git a/src/stdcall_c_if97.rs b/src/stdcall_c_if97.rs
index 3b7d607..5a0a787 100644
--- a/src/stdcall_c_if97.rs
+++ b/src/stdcall_c_if97.rs
@@ -62,7 +62,6 @@ pub unsafe extern "stdcall" fn px(p: f64, x: f64, o_id: i32) -> f64 {
     match o_id {
         OP => return p,
         OX => return x,
-        OT => return px_reg4(p, x, o_id),
         _ => return px_reg4(p, x, o_id),
     }
 }