diff --git a/src/report/report-cgroup.c b/src/report/report-cgroup.c
index 48fcbb5a64..240f09f9f2 100644
--- a/src/report/report-cgroup.c
+++ b/src/report/report-cgroup.c
@@ -5,6 +5,7 @@
 
 #include "alloc-util.h"
 #include "cgroup-util.h"
+#include "errno-util.h"
 #include "extract-word.h"
 #include "fd-util.h"
 #include "fileio.h"
@@ -97,7 +98,7 @@ static int io_stat_parse(const char *cgroup_path, uint64_t ret[static 2]) {
 
         _cleanup_fclose_ FILE *f = fopen(path, "re");
         if (!f)
-                return -errno;
+                return errno_or_else(EIO);
 
         for (;;) {
                 _cleanup_free_ char *line = NULL;