diff --git a/usr.sbin/pmcstat/pmcpl_callgraph.c b/usr.sbin/pmcstat/pmcpl_callgraph.c
index 53d342bfdc15..d948b77f43b6 100644
--- a/usr.sbin/pmcstat/pmcpl_callgraph.c
+++ b/usr.sbin/pmcstat/pmcpl_callgraph.c
@@ -581,6 +581,8 @@ pmcpl_cg_topdisplay(void)
 	struct pmcstat_pmcrecord *pmcr;
 
 	pmcr = pmcstat_pmcindex_to_pmcr(pmcstat_pmcinfilter);
+	if (!pmcr)
+		err(EX_SOFTWARE, "ERROR: invalid pmcindex");
 
 	/*
 	 * We pull out all callgraph nodes in the top-level hash table
diff --git a/usr.sbin/pmcstat/pmcpl_gprof.c b/usr.sbin/pmcstat/pmcpl_gprof.c
index 9327eb95b62d..2027ecf38e71 100644
--- a/usr.sbin/pmcstat/pmcpl_gprof.c
+++ b/usr.sbin/pmcstat/pmcpl_gprof.c
@@ -171,6 +171,8 @@ pmcstat_gmon_create_name(const char *samplesdir, struct pmcstat_image *image,
 	char fullpath[PATH_MAX];
 
 	pmcname = pmcstat_pmcid_to_name(pmcid);
+	if (!pmcname)
+		err(EX_SOFTWARE, "ERROR: cannot find pmcid");
 
 	(void) snprintf(fullpath, sizeof(fullpath),
 	    "%s/%s/%s", samplesdir, pmcname,
diff --git a/usr.sbin/pmcstat/pmcstat_log.c b/usr.sbin/pmcstat/pmcstat_log.c
index 51f66ca9e25a..6d8c57a760aa 100644
--- a/usr.sbin/pmcstat/pmcstat_log.c
+++ b/usr.sbin/pmcstat/pmcstat_log.c
@@ -1050,7 +1050,6 @@ pmcstat_pmcid_to_name(pmc_id_t pmcid)
 	    if (pr->pr_pmcid == pmcid)
 		    return (pmcstat_string_unintern(pr->pr_pmcname));
 
-	err(EX_SOFTWARE, "ERROR: cannot find pmcid");
 	return NULL;
 }
 
@@ -1083,7 +1082,6 @@ pmcstat_pmcindex_to_pmcr(int pmcin)
 		if (pr->pr_pmcin == pmcin)
 			return pr;
 
-	err(EX_SOFTWARE, "ERROR: invalid pmcindex");
 	return NULL;
 }