diff --git a/ios/OPSQLite.mm b/ios/OPSQLite.mm
index 8200ea71..e4e65e0e 100644
--- a/ios/OPSQLite.mm
+++ b/ios/OPSQLite.mm
@@ -116,7 +116,7 @@ - (NSDictionary *)getConstants {
       NSLibraryDirectory, NSUserDomainMask, true) objectAtIndex:0];
 
   NSString *filename = args[@"filename"];
-  BOOL overwrite = args[@"overwrite"];
+  BOOL overwrite = [args[@"overwrite"] boolValue];
 
   NSString *sourcePath = [[NSBundle mainBundle] pathForResource:filename
                                                          ofType:nil];