diff --git a/lib/compress/zstd_cwksp.h b/lib/compress/zstd_cwksp.h
index 39d064c49..a6a4a3fb8 100644
--- a/lib/compress/zstd_cwksp.h
+++ b/lib/compress/zstd_cwksp.h
@@ -404,7 +404,7 @@ MEM_STATIC void ZSTD_cwksp_move(ZSTD_cwksp* dst, ZSTD_cwksp* src) {
 }
 
 MEM_STATIC size_t ZSTD_cwksp_sizeof(const ZSTD_cwksp* ws) {
-    return (BYTE*)ws->workspaceEnd - (BYTE*)ws->workspace;
+    return (size_t)((BYTE*)ws->workspaceEnd - (BYTE*)ws->workspace);
 }
 
 MEM_STATIC int ZSTD_cwksp_reserve_failed(const ZSTD_cwksp* ws) {
diff --git a/programs/fileio.c b/programs/fileio.c
index eecdf0dd3..f05275286 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -648,7 +648,7 @@ int FIO_checkFilenameCollisions(const char** filenameTable, unsigned nbFiles) {
         DISPLAY("Unable to malloc new str array, not checking for name collisions\n");
         return 1;
     }
-    
+
     for (u = 0; u < nbFiles; ++u) {
         filename = strrchr(filenameTable[u], c[0]);
         if (filename == NULL) {
@@ -715,7 +715,7 @@ FIO_createFilename_fromOutDir(const char* srcFilename, const char* outDirName, c
     strcpy(result, outDirName);
     if (outDirName[strlen(outDirName)-1] == c[0]) {
         strcat(result, filename);
-    } else {  
+    } else {
         strcat(result, c);
         strcat(result, filename);
     }
@@ -1493,7 +1493,7 @@ FIO_determineCompressedName(const char* srcFileName, const char* outDirName, con
         sfnSize = strlen(outDirFilename);
         assert(outDirFilename != NULL);
     }
-    
+
     if (dfnbCapacity <= sfnSize+suffixSize+1) {
         /* resize buffer for dstName */
         free(dstFileNameBuffer);
@@ -1522,9 +1522,10 @@ FIO_determineCompressedName(const char* srcFileName, const char* outDirName, con
  * or into one file each (outFileName == NULL, but suffix != NULL),
  * or into a destination folder (specified with -O)
  */
-int FIO_compressMultipleFilenames(FIO_prefs_t* const prefs, const char** inFileNamesTable,
-                                  const char* outDirName, unsigned nbFiles, 
-                                  const char* outFileName, const char* suffix, 
+int FIO_compressMultipleFilenames(FIO_prefs_t* const prefs,
+                                  const char** inFileNamesTable, unsigned nbFiles,
+                                  const char* outDirName,
+                                  const char* outFileName, const char* suffix,
                                   const char* dictFileName, int compressionLevel,
                                   ZSTD_compressionParameters comprParams)
 {
@@ -2278,7 +2279,7 @@ FIO_determineDstName(const char* srcFileName, const char* outDirName)
     char* outDirFilename = NULL;
     size_t sfnSize = strlen(srcFileName);
     size_t suffixSize;
-    
+
     const char* const suffixPtr = strrchr(srcFileName, '.');
     if (suffixPtr == NULL) {
         DISPLAYLEVEL(1, "zstd: %s: unknown suffix -- ignored \n",
@@ -2328,7 +2329,7 @@ FIO_determineDstName(const char* srcFileName, const char* outDirName)
         dfnbCapacity = sfnSize + 20;
         dstFileNameBuffer = (char*)malloc(dfnbCapacity);
         if (dstFileNameBuffer==NULL)
-            EXM_THROW(74, "%s : not enough memory for dstFileName", strerror(errno)); 
+            EXM_THROW(74, "%s : not enough memory for dstFileName", strerror(errno));
     }
 
     /* return dst name == src name truncated from suffix */
diff --git a/programs/fileio.h b/programs/fileio.h
index ded1c0373..841e0a3c1 100644
--- a/programs/fileio.h
+++ b/programs/fileio.h
@@ -104,10 +104,11 @@ int FIO_listMultipleFiles(unsigned numFiles, const char** filenameTable, int dis
 ***************************************/
 /** FIO_compressMultipleFilenames() :
     @return : nb of missing files */
-int FIO_compressMultipleFilenames(FIO_prefs_t* const prefs, const char** inFileNamesTable,
-                                  const char* outDirName, unsigned nbFiles, 
-                                  const char* outFileName, const char* suffix, 
-                                  const char* dictFileName, int compressionLevel, 
+int FIO_compressMultipleFilenames(FIO_prefs_t* const prefs,
+                                  const char** inFileNamesTable, unsigned nbFiles,
+                                  const char* outDirName,
+                                  const char* outFileName, const char* suffix,
+                                  const char* dictFileName, int compressionLevel,
                                   ZSTD_compressionParameters comprParams);
 
 /** FIO_decompressMultipleFilenames() :
diff --git a/programs/zstdcli.c b/programs/zstdcli.c
index 6c6c10f28..4d1fad706 100644
--- a/programs/zstdcli.c
+++ b/programs/zstdcli.c
@@ -1177,7 +1177,7 @@ int main(int argCount, const char* argv[])
         if ((filenameIdx==1) && outFileName)
           operationResult = FIO_compressFilename(prefs, outFileName, filenameTable[0], dictFileName, cLevel, compressionParams);
         else
-          operationResult = FIO_compressMultipleFilenames(prefs, filenameTable, outDirName, filenameIdx, outFileName, suffix, dictFileName, cLevel, compressionParams);
+          operationResult = FIO_compressMultipleFilenames(prefs, filenameTable, filenameIdx, outDirName, outFileName, suffix, dictFileName, cLevel, compressionParams);
 #else
         (void)suffix; (void)adapt; (void)rsyncable; (void)ultra; (void)cLevel; (void)ldmFlag; (void)literalCompressionMode; (void)targetCBlockSize; (void)streamSrcSize; (void)srcSizeHint; /* not used when ZSTD_NOCOMPRESS set */
         DISPLAY("Compression not supported \n");