diff --git a/glslang/CInterface/glslang_c_interface.cpp b/glslang/CInterface/glslang_c_interface.cpp
index bf00b4e06..cb5666596 100644
--- a/glslang/CInterface/glslang_c_interface.cpp
+++ b/glslang/CInterface/glslang_c_interface.cpp
@@ -391,6 +391,11 @@ GLSLANG_EXPORT const char* glslang_shader_get_preprocessed_code(glslang_shader_t
     return shader->preprocessedGLSL.c_str();
 }
 
+GLSLANG_EXPORT void glslang_shader_set_preprocessed_code(glslang_shader_t* shader, const char* code)
+{
+    shader->preprocessedGLSL.assign(code);
+}
+
 GLSLANG_EXPORT int glslang_shader_preprocess(glslang_shader_t* shader, const glslang_input_t* input)
 {
     DirStackFileIncluder dirStackFileIncluder;
diff --git a/glslang/Include/glslang_c_interface.h b/glslang/Include/glslang_c_interface.h
index 459b12166..1deafad86 100644
--- a/glslang/Include/glslang_c_interface.h
+++ b/glslang/Include/glslang_c_interface.h
@@ -274,6 +274,7 @@ GLSLANG_EXPORT void glslang_shader_set_default_uniform_block_name(glslang_shader
 GLSLANG_EXPORT int glslang_shader_preprocess(glslang_shader_t* shader, const glslang_input_t* input);
 GLSLANG_EXPORT int glslang_shader_parse(glslang_shader_t* shader, const glslang_input_t* input);
 GLSLANG_EXPORT const char* glslang_shader_get_preprocessed_code(glslang_shader_t* shader);
+GLSLANG_EXPORT void glslang_shader_set_preprocessed_code(glslang_shader_t* shader, const char* code);
 GLSLANG_EXPORT const char* glslang_shader_get_info_log(glslang_shader_t* shader);
 GLSLANG_EXPORT const char* glslang_shader_get_info_debug_log(glslang_shader_t* shader);