diff --git a/glslUtil/glslUtil.c b/glslUtil/glslUtil.c
index 50102c9..29b1342 100644
--- a/glslUtil/glslUtil.c
+++ b/glslUtil/glslUtil.c
@@ -274,7 +274,7 @@ GLuint guMakeBuffer(GLenum target, GLenum usage, const void *ptr, size_t sz)
 }
 
 GLuint guMakeProgramFromSource(const char *v_shader, const char *f_shader,
-        guAttribBinding *bindings)
+        const guAttribBinding *bindings)
 {
     GLuint v_shader_id = guMakeShader(GL_VERTEX_SHADER, v_shader);
     GLuint f_shader_id = guMakeShader(GL_FRAGMENT_SHADER, f_shader);
@@ -287,7 +287,7 @@ GLuint guMakeProgramFromSource(const char *v_shader, const char *f_shader,
 }
 
 GLuint guMakeProgramFromFiles(const char *v_shader, const char *f_shader,
-        guAttribBinding *bindings)
+        const guAttribBinding *bindings)
 {
     GLuint v_shader_id = guMakeShaderFromFile(GL_VERTEX_SHADER, v_shader);
     GLuint f_shader_id = guMakeShaderFromFile(GL_FRAGMENT_SHADER, f_shader);
@@ -300,7 +300,7 @@ GLuint guMakeProgramFromFiles(const char *v_shader, const char *f_shader,
 }
 
 GLuint guMakeProgram(GLuint v_shader_id, GLuint f_shader_id,
-        guAttribBinding *bindings)
+        const guAttribBinding *bindings)
 {
     GLuint program = glCreateProgram();
     glAttachShader(program, v_shader_id);
diff --git a/glslUtil/glslUtil.h b/glslUtil/glslUtil.h
index be1073a..fbed09d 100644
--- a/glslUtil/glslUtil.h
+++ b/glslUtil/glslUtil.h
@@ -40,11 +40,11 @@ GLuint guMakeShaderFromFile(GLenum shaderType, const char *fname);
 GLuint guMakeShader(GLenum shaderType, const char *source);
 GLuint guMakeBuffer(GLenum target, GLenum usage, const void *ptr, size_t sz);
 GLuint guMakeProgramFromSource(const char *v_shader, const char *f_shader,
-        guAttribBinding *bindings);
+        const guAttribBinding *bindings);
 GLuint guMakeProgramFromFiles(const char *v_shader, const char *f_shader,
-        guAttribBinding *bindings);
+        const guAttribBinding *bindings);
 GLuint guMakeProgram(GLuint v_shader_id, GLuint f_shader_id,
-        guAttribBinding *bindings);
+        const guAttribBinding *bindings);
 
 #ifdef __cplusplus
 }