diff --git a/c_src/cauchycoding.cpp b/c_src/cauchycoding.cpp
index 7d627ed..c17bda6 100644
--- a/c_src/cauchycoding.cpp
+++ b/c_src/cauchycoding.cpp
@@ -97,7 +97,7 @@ ERL_NIF_TERM CauchyCoding::doDecode(vector<ERL_NIF_TERM> blockList, vector<int>
         throw std::invalid_argument("Blocks should be unique");
     }
 
-    size_t blockSize;
+    size_t blockSize = 0;
 
     ErlNifBinary blocks[k + m];
     for(size_t i = 0; i < blockIdList.size(); ++i) {
@@ -165,7 +165,7 @@ vector<ERL_NIF_TERM> CauchyCoding::doRepair(vector<ERL_NIF_TERM> blockList, vect
         throw std::invalid_argument("Blocks should be unique");
     }
 
-    size_t blockSize;
+    size_t blockSize = 0;
 
     ErlNifBinary blocks[k + m];
     for(size_t i = 0; i < blockIdList.size(); ++i) {
diff --git a/c_src/irscoding.cpp b/c_src/irscoding.cpp
index 24891a3..3e55794 100644
--- a/c_src/irscoding.cpp
+++ b/c_src/irscoding.cpp
@@ -91,7 +91,7 @@ ERL_NIF_TERM IRSCoding::doDecode(vector<ERL_NIF_TERM> blockList, vector<int> blo
         throw std::invalid_argument("Blocks should be unique");
     }
 
-    size_t blockSize;
+    size_t blockSize = 0;
     unsigned char* availBlocks[k + m];
 
     ErlNifBinary blocks[k + m];
@@ -147,7 +147,7 @@ vector<ERL_NIF_TERM> IRSCoding::doRepair(vector<ERL_NIF_TERM> blockList, vector<
         throw std::invalid_argument("Blocks should be unique");
     }
 
-    size_t blockSize;
+    size_t blockSize = 0;
     unsigned char* availBlocks[k + m];
 
     ErlNifBinary blocks[k + m];
diff --git a/c_src/liberationcoding.cpp b/c_src/liberationcoding.cpp
index 023f5c4..4664807 100644
--- a/c_src/liberationcoding.cpp
+++ b/c_src/liberationcoding.cpp
@@ -95,7 +95,7 @@ ERL_NIF_TERM LiberationCoding::doDecode(vector<ERL_NIF_TERM> blockList, vector<i
         throw std::invalid_argument("Blocks should be unique");
     }
 
-    size_t blockSize;
+    size_t blockSize = 0;
 
     ErlNifBinary blocks[k + m];
     for(size_t i = 0; i < blockIdList.size(); ++i) {
@@ -162,7 +162,7 @@ vector<ERL_NIF_TERM> LiberationCoding::doRepair(vector<ERL_NIF_TERM> blockList,
         throw std::invalid_argument("Blocks should be unique");
     }
 
-    size_t blockSize;
+    size_t blockSize = 0;
 
     ErlNifBinary blocks[k + m];
     for(size_t i = 0; i < blockIdList.size(); ++i) {