diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index d77bf5cf98..5628d8c910 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -536,9 +536,7 @@ int config_parse_exec(const char *unit,
                                 }
 
                                 if (!utf8_is_valid(path)) {
-                                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
-                                                   "Path is not UTF-8 clean, ignoring assignment: %s",
-                                                   rvalue);
+                                        log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
                                         r = 0;
                                         goto fail;
                                 }
@@ -553,9 +551,7 @@ int config_parse_exec(const char *unit,
                                 }
 
                                 if (!utf8_is_valid(c)) {
-                                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
-                                                   "Path is not UTF-8 clean, ignoring assignment: %s",
-                                                   rvalue);
+                                        log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
                                         r = 0;
                                         goto fail;
                                 }
@@ -1960,8 +1956,7 @@ int config_parse_unit_requires_mounts_for(
                         return log_oom();
 
                 if (!utf8_is_valid(n)) {
-                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
-                                   "Path is not UTF-8 clean, ignoring assignment: %s", rvalue);
+                        log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
                         continue;
                 }
 
@@ -2885,7 +2880,7 @@ int config_parse_namespace_path_strv(
                         return log_oom();
 
                 if (!utf8_is_valid(n)) {
-                        log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Path is not UTF-8 clean, ignoring assignment: %s", rvalue);
+                        log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
                         continue;
                 }
 
diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
index 0a87a71513..d27b1b7eea 100644
--- a/src/shared/conf-parser.c
+++ b/src/shared/conf-parser.c
@@ -585,7 +585,7 @@ int config_parse_string(
         assert(data);
 
         if (!utf8_is_valid(rvalue)) {
-                log_syntax(unit, LOG_ERR, filename, line, EINVAL, "String is not UTF-8 clean, ignoring assignment: %s", rvalue);
+                log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
                 return 0;
         }
 
@@ -623,7 +623,7 @@ int config_parse_path(
         assert(data);
 
         if (!utf8_is_valid(rvalue)) {
-                log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Path is not UTF-8 clean, ignoring assignment: %s", rvalue);
+                log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
                 return 0;
         }
 
@@ -688,8 +688,7 @@ int config_parse_strv(const char *unit,
                         return log_oom();
 
                 if (!utf8_is_valid(n)) {
-                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
-                                   "String is not UTF-8 clean, ignoring: %s", rvalue);
+                        log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
                         continue;
                 }
 
diff --git a/src/shared/conf-parser.h b/src/shared/conf-parser.h
index e1c7ab44c9..ba0e58db25 100644
--- a/src/shared/conf-parser.h
+++ b/src/shared/conf-parser.h
@@ -121,6 +121,12 @@ int log_syntax_internal(const char *unit, int level,
                             config_file, config_line,                   \
                             error, __VA_ARGS__)
 
+#define log_invalid_utf8(unit, level, config_file, config_line, error, rvalue) { \
+        _cleanup_free_ char *__p = utf8_escape_invalid(rvalue);                  \
+        log_syntax(unit, level, config_file, config_line, error,                 \
+                   "String is not UTF-8 clean, ignoring assignment: %s", __p);   \
+        }
+
 #define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg)                \
         int function(const char *unit,                                  \
                      const char *filename,                              \
diff --git a/src/shared/fileio.c b/src/shared/fileio.c
index d5915673d6..f10126954b 100644
--- a/src/shared/fileio.c
+++ b/src/shared/fileio.c
@@ -598,15 +598,18 @@ static int load_env_file_push(const char *filename, unsigned line,
         int r;
 
         if (!utf8_is_valid(key)) {
+                _cleanup_free_ char *t = utf8_escape_invalid(key);
+
                 log_error("%s:%u: invalid UTF-8 for key '%s', ignoring.",
-                          filename, line, key);
+                          filename, line, t);
                 return -EINVAL;
         }
 
         if (value && !utf8_is_valid(value)) {
-                /* FIXME: filter UTF-8 */
+                _cleanup_free_ char *t = utf8_escape_invalid(value);
+
                 log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.",
-                          filename, line, key, value);
+                          filename, line, key, t);
                 return -EINVAL;
         }