diff --git a/modules/line_descriptor/include/opencv2/line_descriptor/bitops.hpp b/modules/line_descriptor/include/opencv2/line_descriptor/bitops.hpp
index f88c69edb..63081c18e 100644
--- a/modules/line_descriptor/include/opencv2/line_descriptor/bitops.hpp
+++ b/modules/line_descriptor/include/opencv2/line_descriptor/bitops.hpp
@@ -143,7 +143,7 @@ inline UINT64 next_set_of_n_elements( UINT64 x )
 /* print code */
 inline void print_code( UINT64 tmp, int b )
 {
-  for ( int j = ( b - 1 ); j >= 0; j-- )
+  for ( long long int j = ( b - 1 ); j >= 0; j-- )
   {
     printf( "%llu", (long long int) tmp / ( 1 << j ) );
     tmp = tmp - ( tmp / ( 1 << j ) ) * ( 1 << j );
diff --git a/modules/line_descriptor/samples/lines_extraction.cpp b/modules/line_descriptor/samples/lines_extraction.cpp
index 065387521..a5edac1b6 100644
--- a/modules/line_descriptor/samples/lines_extraction.cpp
+++ b/modules/line_descriptor/samples/lines_extraction.cpp
@@ -78,6 +78,7 @@ int main( int argc, char** argv )
   if( imageMat.data == NULL )
   {
     std::cout << "Error, image could not be loaded. Please, check its path" << std::endl;
+    return -1;
   }
 
   /* create a random binary mask */
diff --git a/modules/line_descriptor/src/array32.cpp b/modules/line_descriptor/src/array32.cpp
index 62be91bf5..cc42dd601 100644
--- a/modules/line_descriptor/src/array32.cpp
+++ b/modules/line_descriptor/src/array32.cpp
@@ -85,7 +85,7 @@ void Array32::push( UINT32 Data )
   {
     if( arr[0] == arr[1] )
     {
-      arr[1] = std::max( ceil( arr[1] * ARRAY_RESIZE_FACTOR ), arr[1] + ARRAY_RESIZE_ADD_FACTOR );
+      arr[1] = (UINT32) std::max( ceil( arr[1] * ARRAY_RESIZE_FACTOR ), arr[1] + ARRAY_RESIZE_ADD_FACTOR );
       UINT32* new_Data = static_cast<UINT32*>( realloc( arr, sizeof(UINT32) * ( 2 + arr[1] ) ) );
       if( new_Data == NULL )
       {
@@ -107,7 +107,7 @@ void Array32::push( UINT32 Data )
 
   else
   {
-    arr = (UINT32*) malloc( ( 2 + ARRAY_RESIZE_ADD_FACTOR ) * sizeof(UINT32) );
+    arr = (UINT32*) malloc( (size_t) ( 2 + ARRAY_RESIZE_ADD_FACTOR ) * sizeof(UINT32) );
     arr[0] = 1;
     arr[1] = 1;
     arr[2] = Data;
@@ -121,7 +121,7 @@ void Array32::insert( UINT32 index, UINT32 Data )
   {
     if( arr[0] == arr[1] )
     {
-      arr[1] = ceil( arr[0] * 1.1 );
+      arr[1] = (UINT32) ceil( arr[0] * 1.1 );
       UINT32* new_data = static_cast<UINT32*>( realloc( arr, sizeof(UINT32) * ( 2 + arr[1] ) ) );
       if( new_data == NULL )
       {
diff --git a/modules/line_descriptor/src/mihasher.cpp b/modules/line_descriptor/src/mihasher.cpp
index 6ed2470ea..90f1cc71a 100644
--- a/modules/line_descriptor/src/mihasher.cpp
+++ b/modules/line_descriptor/src/mihasher.cpp
@@ -86,7 +86,7 @@ void Mihasher::query( UINT32* results, UINT32* numres, UINT8 * Query, UINT64 *ch
 {
   /* if K == 0 that means we want everything to be processed.
    So maxres = N in that case. Otherwise K limits the results processed */
-  UINT32 maxres = K ? K : N;
+  UINT32 maxres = K ? K : (UINT32) N;
 
   /* number of results so far obtained (up to a distance of s per chunk) */
   UINT32 n = 0;
@@ -142,7 +142,8 @@ void Mihasher::query( UINT32* results, UINT32* numres, UINT8 * Query, UINT64 *ch
        it touches another one */
 
       /* the loop for changing bitstr */
-      while ( true )
+      bool infiniteWhile = true;
+      while ( infiniteWhile )
       {
         if( bit != -1 )
         {
@@ -207,12 +208,12 @@ Mihasher::Mihasher( int _B, int _m )
   B = _B;
   B_over_8 = B / 8;
   m = _m;
-  b = ceil( (double) B / m );
+  b = (int) ceil( (double) B / m );
 
   /* assuming that B/2 is large enough radius to include
    all of the k nearest neighbors */
-  D = ceil( B / 2.0 );
-  d = ceil( (double) D / m );
+  D = (int) ceil( B / 2.0 );
+  d = (int) ceil( (double) D / m );
 
   /* mplus is the number of chunks with b bits
    (m-mplus) is the number of chunks with (b-1) bits */
@@ -221,7 +222,7 @@ Mihasher::Mihasher( int _B, int _m )
   xornum = new UINT32[d + 2];
   xornum[0] = 0;
   for ( int i = 0; i <= d; i++ )
-    xornum[i + 1] = xornum[i] + choose( b, i );
+    xornum[i + 1] = xornum[i] + (UINT32) choose( b, i );
 
   H = new SparseHashtable[m];
 
@@ -258,7 +259,7 @@ void Mihasher::populate( cv::Mat & _codes, UINT32 _N, int dim1codes )
     split( chunks, pcodes, m, mplus, b );
 
     for ( int k = 0; k < m; k++ )
-      H[k].insert( chunks[k], i );
+      H[k].insert( chunks[k], (UINT32) i );
 
     if( i % (int) ceil( N / 1000.0 ) == 0 )
       fflush( stdout );