diff --git a/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.cpp b/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.cpp
index 64db1d2..b4f58c1 100644
--- a/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.cpp
+++ b/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.cpp
@@ -108,7 +108,7 @@ int ZrtpRandom::getRandomData(uint8_t* buffer, uint32_t length) {
 }
 
 
-int ZrtpRandom::addEntropy(const uint8_t *buffer, uint32_t length, bool isLocked)
+int ZrtpRandom::addEntropy(const uint8_t *buffer, uint32_t length, int32_t isLocked)
 {
 
     uint8_t newSeed[64];
@@ -161,7 +161,7 @@ size_t ZrtpRandom::getSystemSeed(uint8_t *seed, size_t length)
     return num;
 }
 
-int zrtp_AddEntropy(const uint8_t *buffer, uint32_t length, bool isLocked) {
+int zrtp_AddEntropy(const uint8_t *buffer, uint32_t length, int32_t isLocked) {
     return ZrtpRandom::addEntropy(buffer, length, isLocked);
 }
 
diff --git a/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.h b/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.h
index d1837ef..bb31b18 100644
--- a/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.h
+++ b/src/ZRTPCPP-4.7.0/cryptcommon/ZrtpRandom.h
@@ -49,7 +49,7 @@ public:
      *         bytes added may be bigger then @c length because of added system
      *         entropy.
      */
-    static int addEntropy(const uint8_t *buffer, uint32_t length, bool isLocked = false);
+    static int addEntropy(const uint8_t *buffer, uint32_t length, int32_t isLocked = false);
 
     /**
      * @brief Get some random data.
@@ -74,7 +74,7 @@ extern "C"
 {
 #endif
 
-int zrtp_AddEntropy(const uint8_t *buffer, uint32_t length, bool isLocked);
+int zrtp_AddEntropy(const uint8_t *buffer, uint32_t length, int32_t isLocked);
 
 int zrtp_getRandomData(uint8_t *buffer, uint32_t length);