diff --git a/Changes b/Changes
index 9dd89e277..dea587c08 100644
--- a/Changes
+++ b/Changes
@@ -15,6 +15,7 @@ Verilator 4.219 devel
 
 * Removed the deprecated lint_off flag -msg; use -rule instead.
 * Removed the deprecated "fl" attribute in XML output; use "loc" attribute instead.
+* Fix skipping public enum values with four-state values (#3303).
 
 
 Verilator 4.218 2022-01-17
diff --git a/src/V3EmitCHeaders.cpp b/src/V3EmitCHeaders.cpp
index 18436adb9..bb26512f2 100644
--- a/src/V3EmitCHeaders.cpp
+++ b/src/V3EmitCHeaders.cpp
@@ -192,6 +192,12 @@ class EmitCHeader final : public EmitCConstInit {
                 puts("enum " + tdefp->name() + " {\n");
                 for (const AstEnumItem* itemp = edtypep->itemsp(); itemp;
                      itemp = VN_AS(itemp->nextp(), EnumItem)) {
+                    if (const AstConst* const constp = VN_CAST(itemp->valuep(), Const)) {
+                        if (constp->num().isFourState()) {
+                            puts("// " + itemp->nameProtect() + " is four-state\n");
+                            continue;
+                        }
+                    }
                     puts(itemp->nameProtect());
                     puts(" = ");
                     iterate(itemp->valuep());
diff --git a/test_regress/t/t_enum_public.v b/test_regress/t/t_enum_public.v
index dfae146c5..60ed94800 100644
--- a/test_regress/t/t_enum_public.v
+++ b/test_regress/t/t_enum_public.v
@@ -8,6 +8,9 @@ package p3;
    typedef enum logic [2:0] {
           ZERO = 3'b0,
           ONE = 3'b1 } e3_t /*verilator public*/;
+   typedef enum logic [2:0] {
+          TWO = 3'd2,
+          XES = 3'b?1? } has_x_t /*verilator public*/;
 endpackage
 
 package p62;