diff --git a/src/mesa/main/stencil.c b/src/mesa/main/stencil.c
index 409b2f0d58c..b303bb7c13f 100644
--- a/src/mesa/main/stencil.c
+++ b/src/mesa/main/stencil.c
@@ -109,6 +109,9 @@ _mesa_ClearStencil( GLint s )
 {
    GET_CURRENT_CONTEXT(ctx);
 
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glClearStencil(%d)\n", s);
+
    ctx->Stencil.Clear = (GLuint) s;
 }