diff --git a/src/V3PreProc.h b/src/V3PreProc.h
index a51dab1bf..43d8f3a19 100644
--- a/src/V3PreProc.h
+++ b/src/V3PreProc.h
@@ -45,7 +45,7 @@ public:
     // CONSTANTS
     enum MiscConsts {
         DEFINE_RECURSION_LEVEL_MAX = 1000,  // How many `def substitutions before an error
-        LINE_TOKEN_MAX = 20000,  // How many tokens on a line before an error
+        LINE_TOKEN_MAX = 40000,  // How many tokens on a line before an error
         INCLUDE_DEPTH_MAX = 500,  // How many `includes deep before an error
         // Streams deep (sometimes `def deep) before an error.
         // Set more than DEFINE_RECURSION_LEVEL_MAX or INCLUDE_DEPTH_MAX.
diff --git a/test_regress/t/t_pp_circ_subst_bad.out b/test_regress/t/t_pp_circ_subst_bad.out
index 657d44e8a..1f566721d 100644
--- a/test_regress/t/t_pp_circ_subst_bad.out
+++ b/test_regress/t/t_pp_circ_subst_bad.out
@@ -1,3 +1,3 @@
-%Error: t/t_pp_circ_subst_bad.v:8:40002: Too many preprocessor tokens on a line (>20000); perhaps recursive `define
+%Error: t/t_pp_circ_subst_bad.v:8:80001: Too many preprocessor tokens on a line (>40000); perhaps recursive `define
 %Error: t/t_pp_circ_subst_bad.v:8:1: syntax error, unexpected IDENTIFIER
 %Error: Exiting due to