diff --git a/.swiftpm/BigInt.xctestplan b/.swiftpm/BigInt.xctestplan
new file mode 100644
index 0000000..e272722
--- /dev/null
+++ b/.swiftpm/BigInt.xctestplan
@@ -0,0 +1,25 @@
+{
+  "configurations" : [
+    {
+      "id" : "46597F33-8980-4C78-B801-7249D0CA45D2",
+      "name" : "Test Scheme Action",
+      "options" : {
+
+      }
+    }
+  ],
+  "defaultOptions" : {
+    "codeCoverage" : false
+  },
+  "testTargets" : [
+    {
+      "parallelizable" : true,
+      "target" : {
+        "containerPath" : "container:",
+        "identifier" : "BigIntTests",
+        "name" : "BigIntTests"
+      }
+    }
+  ],
+  "version" : 1
+}
diff --git a/Sources/BigInt/BigInt.swift b/Sources/BigInt/BigInt.swift
index 4206be6..b734cd3 100755
--- a/Sources/BigInt/BigInt.swift
+++ b/Sources/BigInt/BigInt.swift
@@ -1726,6 +1726,15 @@ public struct BInt: CustomStringConvertible, Comparable, Equatable, Hashable, Co
     
     // MARK: Prime number functions
     
+    #if os(Linux)
+    static internal func randomBytes(_ bytes: inout Bytes) {
+        for i in bytes.indices { bytes[i] = Byte.random(in: bytes.indices) }
+    }
+    
+    static internal func randomLimbs(_ limbs: inout Limbs) {
+        for i in limbs.indices { limbs[i] = Limb.random(in: limbs.indices) }
+    }
+    #else
     static internal func randomBytes(_ bytes: inout Bytes) {
         guard SecRandomCopyBytes(kSecRandomDefault, bytes.count, &bytes) == errSecSuccess else {
             fatalError("randomBytes failed")
@@ -1737,6 +1746,7 @@ public struct BInt: CustomStringConvertible, Comparable, Equatable, Hashable, Co
             fatalError("randomLimbs failed")
         }
     }
+    #endif
     
     // Small prime product
     static let SPP = BInt("152125131763605")! // = 3 * 5 * 7 * 11 * 13 * 17 * 19 * 23 * 29 * 31 * 37 * 41