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-rw-r--r--lib/libzpool/util.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/libzpool/util.c b/lib/libzpool/util.c
index 3bdc31722..8e1c104a3 100644
--- a/lib/libzpool/util.c
+++ b/lib/libzpool/util.c
@@ -182,7 +182,7 @@ set_global_var(char *arg)
"little-endian systems\n");
return (ENOTSUP);
#endif
- if ((varval = strchr(arg, '=')) != NULL) {
+ if (arg != NULL && (varval = strchr(arg, '=')) != NULL) {
*varval = '\0';
varval++;
val = strtoull(varval, NULL, 0);