diff --git a/sportspress-for-baseball.php b/sportspress-for-baseball.php
index 5baaa0b..e997eff 100644
--- a/sportspress-for-baseball.php
+++ b/sportspress-for-baseball.php
@@ -287,7 +287,7 @@ public function convert_real_value_to_partial_innings_notation( $value, $key ) {
 			$this->get_partial_inning_keys();
 		}
 
-		if ( in_array( $key, $this->partial_inning_keys ) ) {
+		if ( is_array( $this->partial_inning_keys ) && in_array( $key, $this->partial_inning_keys ) ) {
 			$value = floatval( $value );
 			$value = floor( $value ) + round( ( $value - floor( $value ) ) * 3 ) / 10;
 		}