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-rw-r--r--src/health/rrdvar.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/health/rrdvar.h b/src/health/rrdvar.h
index 31530589d..3297984cb 100644
--- a/src/health/rrdvar.h
+++ b/src/health/rrdvar.h
@@ -19,7 +19,7 @@ void rrdvar_host_variable_set(RRDHOST *host, const RRDVAR_ACQUIRED *rva, NETDATA
int rrdvar_walkthrough_read(DICTIONARY *dict, int (*callback)(const DICTIONARY_ITEM *item, void *rrdvar, void *data), void *data);
#define rrdvar_host_variable_release(host, rva) rrdvar_release((host)->rrdvars, rva)
-#define rrdvar_chart_variable_release(st, rva) rrdvar_release((st)->rrdvars, rva)
+#define rrdvar_chart_variable_release(st, rva) do { if(st) rrdvar_release((st)->rrdvars, rva); } while(0)
void rrdvar_release(DICTIONARY *dict, const RRDVAR_ACQUIRED *rva);
NETDATA_DOUBLE rrdvar2number(const RRDVAR_ACQUIRED *rva);