Index: src/spicelib/analysis/cktsetup.c
--- src/spicelib/analysis/cktsetup.c.orig
+++ src/spicelib/analysis/cktsetup.c
@@ -21,7 +21,6 @@ Author: 1985 Thomas L. Quarles
 #endif
 
 #ifdef USE_OMP
-#include <omp.h>
 #include "ngspice/cpextern.h"
 int nthreads;
 #endif
