1 files changed, 1 insertions, 1 deletions

diff --git a/lib/perfdata.c b/lib/perfdata.c
index 661756c5..4f9c9558 100644
--- a/lib/perfdata.c
+++ b/lib/perfdata.c
@@ -33,7 +33,7 @@ char *pd_value_to_string(const mp_perfdata_value pd) {
 char *pd_to_string(mp_perfdata pd) {
         assert(pd.label != NULL);
         char *result = NULL;
-        asprintf(&result, "%s=", pd.label);
+        asprintf(&result, "'%s'=", pd.label);
 
         asprintf(&result, "%s%s", result, pd_value_to_string(pd.value));