diff --git a/src/compiler/glsl/standalone_scaffolding.cpp b/src/compiler/glsl/standalone_scaffolding.cpp
index 1d84d674f99..5cd52e6db90 100644
--- a/src/compiler/glsl/standalone_scaffolding.cpp
+++ b/src/compiler/glsl/standalone_scaffolding.cpp
@@ -55,7 +55,7 @@ _mesa_warning(struct gl_context *ctx, const char *fmt, ...)
 }
 
 void
-_mesa_problem(struct gl_context *ctx, const char *fmt, ...)
+_mesa_problem(const struct gl_context *ctx, const char *fmt, ...)
 {
     va_list vargs;
     (void) ctx;
diff --git a/src/compiler/glsl/standalone_scaffolding.h b/src/compiler/glsl/standalone_scaffolding.h
index 083d56fe29d..404297641b0 100644
--- a/src/compiler/glsl/standalone_scaffolding.h
+++ b/src/compiler/glsl/standalone_scaffolding.h
@@ -38,7 +38,7 @@ extern "C" void
 _mesa_warning(struct gl_context *ctx, const char *fmtString, ... );
 
 extern "C" void
-_mesa_problem(struct gl_context *ctx, const char *fmtString, ... );
+_mesa_problem(const struct gl_context *ctx, const char *fmtString, ... );
 
 extern "C" void
 _mesa_reference_shader_program_data(struct gl_shader_program_data **ptr,