diff --git a/dlls/d3dcompiler_43/bytecodewriter.c b/dlls/d3dcompiler_43/bytecodewriter.c
index 35da93fc6db..5366fa589b1 100644
--- a/dlls/d3dcompiler_43/bytecodewriter.c
+++ b/dlls/d3dcompiler_43/bytecodewriter.c
@@ -2410,7 +2410,7 @@ static HRESULT call_instr_handler(struct bc_writer *writer,
     return E_INVALIDARG;
 }
 
-HRESULT SlWriteBytecode(const struct bwriter_shader *shader, int dxversion, DWORD **result, DWORD *size)
+HRESULT shader_write_bytecode(const struct bwriter_shader *shader, DWORD **result, DWORD *size)
 {
     struct bc_writer *writer;
     struct bytecode_buffer *buffer = NULL;
diff --git a/dlls/d3dcompiler_43/compiler.c b/dlls/d3dcompiler_43/compiler.c
index 73f8c705a00..9fc7c1d7734 100644
--- a/dlls/d3dcompiler_43/compiler.c
+++ b/dlls/d3dcompiler_43/compiler.c
@@ -602,11 +602,11 @@ static HRESULT assemble_shader(const char *preproc_shader,
         return D3DXERR_INVALIDDATA;
     }
 
-    hr = SlWriteBytecode(shader, 9, &res, &size);
+    hr = shader_write_bytecode(shader, &res, &size);
     SlDeleteShader(shader);
     if (FAILED(hr))
     {
-        ERR("SlWriteBytecode failed with 0x%08x\n", hr);
+        ERR("Failed to write bytecode, hr %#x.\n", hr);
         return D3DXERR_INVALIDDATA;
     }
 
@@ -829,11 +829,11 @@ static HRESULT compile_shader(const char *preproc_shader, const char *target, co
         return D3DXERR_INVALIDDATA;
     }
 
-    hr = SlWriteBytecode(shader, 9, &res, &size);
+    hr = shader_write_bytecode(shader, &res, &size);
     SlDeleteShader(shader);
     if (FAILED(hr))
     {
-        ERR("SlWriteBytecode failed with error 0x%08x.\n", hr);
+        ERR("Failed to write bytecode, hr %#x.\n", hr);
         return D3DXERR_INVALIDDATA;
     }
 
diff --git a/dlls/d3dcompiler_43/d3dcompiler_private.h b/dlls/d3dcompiler_43/d3dcompiler_private.h
index 1a9d68e7206..51cfc395524 100644
--- a/dlls/d3dcompiler_43/d3dcompiler_private.h
+++ b/dlls/d3dcompiler_43/d3dcompiler_private.h
@@ -591,7 +591,7 @@ enum bwriterdeclusage
 #define T3_REG          5
 
 struct bwriter_shader *SlAssembleShader(const char *text, char **messages) DECLSPEC_HIDDEN;
-HRESULT SlWriteBytecode(const struct bwriter_shader *shader, int dxversion, DWORD **result, DWORD *size) DECLSPEC_HIDDEN;
+HRESULT shader_write_bytecode(const struct bwriter_shader *shader, DWORD **result, DWORD *size) DECLSPEC_HIDDEN;
 void SlDeleteShader(struct bwriter_shader *shader) DECLSPEC_HIDDEN;
 
 /* The general IR structure is inspired by Mesa GLSL hir, even though the code