diff --git a/src/spicelib/devices/vsrc/vsrcdefs.h b/src/spicelib/devices/vsrc/vsrcdefs.h
index 0cffed3f3..f8bfd78de 100644
--- a/src/spicelib/devices/vsrc/vsrcdefs.h
+++ b/src/spicelib/devices/vsrc/vsrcdefs.h
@@ -12,8 +12,6 @@ Author: 1985 Thomas L. Quarles
 #include "ngspice/complex.h"
 #include "uisrc.h"
 
-struct trnoise_state;
-
 /*
  * structures to describe independent voltage sources
  */