diff --git a/src/bmffimage.cpp b/src/bmffimage.cpp
index f8afa9a7..28c8a0c8 100644
--- a/src/bmffimage.cpp
+++ b/src/bmffimage.cpp
@@ -189,7 +189,7 @@ namespace Exiv2
     long BmffImage::boxHandler(std::ostream& out /* = std::cout*/ , Exiv2::PrintStructureOption option /* = kpsNone */,int depth /* =0 */)
     {
         long result  = (long)io_->size();
-        long address = io_->tell();
+        long address = (long)io_->tell();
         // never visit a box twice!
         if ( depth == 0 ) visits_.clear();
         if (visits_.find(address) != visits_.end() || visits_.size() > visits_max_) {
diff --git a/src/image_int.cpp b/src/image_int.cpp
index c553e46d..c7c4802a 100644
--- a/src/image_int.cpp
+++ b/src/image_int.cpp
@@ -61,10 +61,10 @@ namespace Exiv2
         {
             std::stringstream hexOutput;
 
-            unsigned long tl = ((size / 16) * 16);
-            unsigned long tl_offset = (size - tl);
+            unsigned long tl = (unsigned long)((size / 16) * 16);
+            unsigned long tl_offset = (unsigned long)(size - tl);
 
-            for (unsigned long loop = 0; loop < size; loop++) {
+            for (unsigned long loop = 0; loop < (unsigned long)size; loop++) {
                 if (data[loop] < 16) {
                     hexOutput << "0";
                 }
diff --git a/src/jpgimage.cpp b/src/jpgimage.cpp
index 147fe2c7..cbc96f0a 100644
--- a/src/jpgimage.cpp
+++ b/src/jpgimage.cpp
@@ -277,7 +277,7 @@ namespace Exiv2 {
         long pos = sizeFront;
         while (0 == Photoshop::locateIptcIrb(pPsData + pos, sizePsData - pos,
                                              &record, &sizeHdr, &sizeIptc)) {
-            const long newPos = record - pPsData;
+            const long newPos = static_cast<long>(record - pPsData);
             // Copy data up to the IPTC IRB
             if (newPos > pos) {
                 append(psBlob, pPsData + pos, newPos - pos);
diff --git a/src/tiffvisitor_int.cpp b/src/tiffvisitor_int.cpp
index 03d0d375..2e89c274 100644
--- a/src/tiffvisitor_int.cpp
+++ b/src/tiffvisitor_int.cpp
@@ -397,7 +397,7 @@ namespace Exiv2 {
             std::string::size_type idx = xmpPacket.find_first_of('<');
             if (idx != std::string::npos && idx > 0) {
 #ifndef SUPPRESS_WARNINGS
-                EXV_WARNING << "Removing " << idx
+                EXV_WARNING << "Removing " << static_cast<unsigned long>(idx)
                             << " characters from the beginning of the XMP packet\n";
 #endif
                 xmpPacket = xmpPacket.substr(idx);