Missed returns
diff --git a/lib/common/bitstream.h b/lib/common/bitstream.h
index c84c0ed..ff891ca 100644
--- a/lib/common/bitstream.h
+++ b/lib/common/bitstream.h
@@ -162,7 +162,7 @@
     {
 #   if defined(_MSC_VER)   /* Visual */
         unsigned long r=0;
-        _BitScanReverse ( &r, val ) ? (unsigned)r : 0;
+        return _BitScanReverse ( &r, val ) ? (unsigned)r : 0;
 #   elif defined(__GNUC__) && (__GNUC__ >= 3)   /* Use GCC Intrinsic */
         return __builtin_clz (val) ^ 31;
 #   elif defined(__ICCARM__)    /* IAR Intrinsic */
diff --git a/lib/common/zstd_internal.h b/lib/common/zstd_internal.h
index 1b02313..04d2ac8 100644
--- a/lib/common/zstd_internal.h
+++ b/lib/common/zstd_internal.h
@@ -298,7 +298,7 @@
     {
 #   if defined(_MSC_VER)   /* Visual */
         unsigned long r=0;
-        _BitScanReverse(&r, val) ? (unsigned)r : 0;
+        return _BitScanReverse(&r, val) ? (unsigned)r : 0;
 #   elif defined(__GNUC__) && (__GNUC__ >= 3)   /* GCC Intrinsic */
         return __builtin_clz (val) ^ 31;
 #   elif defined(__ICCARM__)    /* IAR Intrinsic */
diff --git a/lib/compress/zstd_compress_internal.h b/lib/compress/zstd_compress_internal.h
index 8fd08da..a004d0a 100644
--- a/lib/compress/zstd_compress_internal.h
+++ b/lib/compress/zstd_compress_internal.h
@@ -465,7 +465,7 @@
         } else { /* 32 bits */
 #       if defined(_MSC_VER)
             unsigned long r=0;
-            _BitScanForward( &r, (U32)val ) ? return (unsigned)(r >> 3) : 0;
+            return _BitScanForward( &r, (U32)val ) ? return (unsigned)(r >> 3) : 0;
 #       elif defined(__GNUC__) && (__GNUC__ >= 3)
             return (__builtin_ctz((U32)val) >> 3);
 #       else
@@ -480,7 +480,7 @@
         if (MEM_64bits()) {
 #       if defined(_MSC_VER) && defined(_WIN64)
             unsigned long r = 0;
-            _BitScanReverse64( &r, val ) ? (unsigned)(r >> 3) : 0;
+            return _BitScanReverse64( &r, val ) ? (unsigned)(r >> 3) : 0;
 #       elif defined(__GNUC__) && (__GNUC__ >= 4)
             return (__builtin_clzll(val) >> 3);
 #       else
@@ -494,7 +494,7 @@
         } else { /* 32 bits */
 #       if defined(_MSC_VER)
             unsigned long r = 0;
-            _BitScanReverse( &r, (unsigned long)val ) ? (unsigned)(r >> 3) : 0;
+            return _BitScanReverse( &r, (unsigned long)val ) ? (unsigned)(r >> 3) : 0;
 #       elif defined(__GNUC__) && (__GNUC__ >= 3)
             return (__builtin_clz((U32)val) >> 3);
 #       else