diff --git a/src/compiler/glsl/glsl_to_nir.cpp b/src/compiler/glsl/glsl_to_nir.cpp
index f2a85a4b13d..3de7eee5498 100644
--- a/src/compiler/glsl/glsl_to_nir.cpp
+++ b/src/compiler/glsl/glsl_to_nir.cpp
@@ -701,6 +701,8 @@ nir_visitor::create_function(ir_function_signature *ir)
       func->params[np].type = param->type;
       func->params[np].is_return = false;
       func->params[np].mode = get_param_mode(param);
+      func->params[np].implicit_conversion_prohibited =
+         !!param->data.implicit_conversion_prohibited;
       np++;
    }
    assert(np == func->num_params);
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index bbd631c88db..98a433275f3 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -3626,6 +3626,8 @@ typedef struct {
    /* True if this paramater is actually the function return variable */
    bool is_return;
 
+   bool implicit_conversion_prohibited;
+
    nir_variable_mode mode;
 
    /* The type of the function param */