diff --git a/src/frontend/hpgl.c b/src/frontend/hpgl.c
index 865bbb62c..806dd97cb 100644
--- a/src/frontend/hpgl.c
+++ b/src/frontend/hpgl.c
@@ -250,6 +250,8 @@ int GL_Arc(int x0, int y0, int r, double theta, double delta_theta)
 
 int GL_Text(char *text, int x, int y, int angle)
 {
+    NG_IGNORE(angle);
+
     /* move to (x, y) */
     NG_IGNORE(angle);