diff --git a/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m b/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m
index dc815f4960c58f57324863a2b0da882a3fe53b93..74673447763eb2d7bc243624f4e86e9d3e52222e 100644
--- a/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m
+++ b/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m
@@ -8,8 +8,11 @@
 - (void)vitals_getHeartRateSamples:(NSDictionary *)input callback:(RCTResponseSenderBlock)callback
 {
     HKQuantityType *heartRateType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierHeartRate];
+    
+    HKUnit *count = [HKUnit countUnit];
+    HKUnit *minute = [HKUnit minuteUnit];
 
-    HKUnit *unit = [RCTAppleHealthKit hkUnitFromOptions:input key:@"unit" withDefault:[HKUnit countUnit]];
+    HKUnit *unit = [RCTAppleHealthKit hkUnitFromOptions:input key:@"unit" withDefault:[count unitDividedByUnit:minute]];
     NSUInteger limit = [RCTAppleHealthKit uintFromOptions:input key:@"limit" withDefault:HKObjectQueryNoLimit];
     BOOL ascending = [RCTAppleHealthKit boolFromOptions:input key:@"ascending" withDefault:false];
     NSDate *startDate = [RCTAppleHealthKit dateFromOptions:input key:@"startDate" withDefault:nil];