diff --git a/src/core/json/include/sourcemeta/core/json.h b/src/core/json/include/sourcemeta/core/json.h
index 7ab734044..0603ca35c 100644
--- a/src/core/json/include/sourcemeta/core/json.h
+++ b/src/core/json/include/sourcemeta/core/json.h
@@ -5,7 +5,6 @@
 #include <sourcemeta/core/json_export.h>
 #endif
 
-#include <sourcemeta/core/json_error.h>
 #include <sourcemeta/core/json_hash.h>
 #include <sourcemeta/core/json_value.h>
 
diff --git a/src/core/json/parser.h b/src/core/json/parser.h
index 5119b7efd..86f2e13e9 100644
--- a/src/core/json/parser.h
+++ b/src/core/json/parser.h
@@ -4,6 +4,7 @@
 #include "grammar.h"
 
 #include <sourcemeta/core/json.h>
+#include <sourcemeta/core/json_error.h>
 
 #include <cassert>    // assert
 #include <cctype>     // std::isxdigit
diff --git a/src/core/jsonl/iterator.cc b/src/core/jsonl/iterator.cc
index cff1a71ab..02f2021bb 100644
--- a/src/core/jsonl/iterator.cc
+++ b/src/core/jsonl/iterator.cc
@@ -1,3 +1,4 @@
+#include <sourcemeta/core/json_error.h>
 #include <sourcemeta/core/jsonl_iterator.h>
 
 #include "grammar.h"
diff --git a/src/core/yaml/yaml.cc b/src/core/yaml/yaml.cc
index ed95e8168..28e438ff4 100644
--- a/src/core/yaml/yaml.cc
+++ b/src/core/yaml/yaml.cc
@@ -1,3 +1,4 @@
+#include <sourcemeta/core/json_error.h>
 #include <sourcemeta/core/yaml.h>
 
 #include <sstream>     // std::ostringstream, std::istringstream
diff --git a/test/json/json_error_test.cc b/test/json/json_error_test.cc
index 18b172a62..6b989b01c 100644
--- a/test/json/json_error_test.cc
+++ b/test/json/json_error_test.cc
@@ -1,5 +1,6 @@
 #include <gtest/gtest.h>
 #include <sourcemeta/core/json.h>
+#include <sourcemeta/core/json_error.h>
 
 #include <exception>   // std::exception
 #include <string>      // std::string
diff --git a/test/json/json_parse_error_test.cc b/test/json/json_parse_error_test.cc
index 2b3316fca..4e5318001 100644
--- a/test/json/json_parse_error_test.cc
+++ b/test/json/json_parse_error_test.cc
@@ -4,6 +4,7 @@
 #include <sstream>
 
 #include <sourcemeta/core/json.h>
+#include <sourcemeta/core/json_error.h>
 
 #define __EXPECT_PARSE_ERROR(input, expected_line, expected_column,            \
                              expected_error, expected_message)                 \
diff --git a/test/json/jsontestsuite.cc b/test/json/jsontestsuite.cc
index 743d30f8c..c6426ca79 100644
--- a/test/json/jsontestsuite.cc
+++ b/test/json/jsontestsuite.cc
@@ -1,4 +1,5 @@
 #include <sourcemeta/core/json.h>
+#include <sourcemeta/core/json_error.h>
 
 #include <gtest/gtest.h>
 
diff --git a/test/jsonl/jsonl_parse_error_test.cc b/test/jsonl/jsonl_parse_error_test.cc
index 41e735824..323dac586 100644
--- a/test/jsonl/jsonl_parse_error_test.cc
+++ b/test/jsonl/jsonl_parse_error_test.cc
@@ -3,6 +3,7 @@
 #include <exception>
 #include <sstream>
 
+#include <sourcemeta/core/json_error.h>
 #include <sourcemeta/core/jsonl.h>
 
 #define EXPECT_PARSE_ERROR(stream, expected_line, expected_column)             \