--- gwyddion.orig/libgwyddion/gwyexpr.c	2019-02-28 17:36:38.000000000 +0100
+++ gwyddion/libgwyddion/gwyexpr.c	2019-02-28 17:36:50.529132147 +0100
@@ -427,7 +427,7 @@ gwy_expr_stack_interpret_vectors(GwyExpr
 {
 #ifdef _OPENMP
 #pragma omp parallel if(gwy_threads_are_enabled()) default(none) \
-            shared(expr,n,data,result)
+            shared(expr,n,data,result,call_table)
 #endif
     {
         gdouble *stack = gwy_omp_if_threads_new(expr->stack, expr->slen);