diff --git a/src/ZstdSharp/Unsafe/ZstdCompress.cs b/src/ZstdSharp/Unsafe/ZstdCompress.cs
index 50521ef..3a3009a 100644
--- a/src/ZstdSharp/Unsafe/ZstdCompress.cs
+++ b/src/ZstdSharp/Unsafe/ZstdCompress.cs
@@ -3221,7 +3221,7 @@ private static nuint ZSTD_buildSeqStore(ZSTD_CCtx_s* zc, void* src, nuint srcSiz
             ZSTD_matchState_t* ms = &zc->blockState.matchState;
             assert(srcSize <= 1 << 17);
             ZSTD_assertEqualCParams(zc->appliedParams.cParams, ms->cParams);
-            if (srcSize < 1 + 1 + ZSTD_blockHeaderSize + 1 + 1)
+            if (srcSize < (nuint)(1 + 1) + ZSTD_blockHeaderSize + 1 + 1)
             {
                 if (zc->appliedParams.cParams.strategy >= ZSTD_strategy.ZSTD_btopt)
                 {
@@ -4422,7 +4422,7 @@ private static nuint ZSTD_compress_frameChunk(ZSTD_CCtx_s* cctx, void* dst, nuin
             {
                 ZSTD_matchState_t* ms = &cctx->blockState.matchState;
                 uint lastBlock = lastFrameChunk & (uint)(blockSize >= remaining ? 1 : 0);
-                if (dstCapacity < ZSTD_blockHeaderSize + (1 + 1) + 1)
+                if (dstCapacity < ZSTD_blockHeaderSize + (nuint)(1 + 1) + 1)
                 {
                     return unchecked((nuint)(-(int)ZSTD_ErrorCode.ZSTD_error_dstSize_tooSmall));
                 }
@@ -7103,7 +7103,7 @@ private static nuint ZSTD_compressSequences_internal(ZSTD_CCtx_s* cctx, void* ds
                 }
 
                 blockSize -= additionalByteAdjustment;
-                if (blockSize < 1 + 1 + ZSTD_blockHeaderSize + 1 + 1)
+                if (blockSize < (nuint)(1 + 1) + ZSTD_blockHeaderSize + 1 + 1)
                 {
                     cBlockSize = ZSTD_noCompressBlock(op, dstCapacity, ip, blockSize, lastBlock);
                     {
diff --git a/src/ZstdSharp/Unsafe/ZstdDecompress.cs b/src/ZstdSharp/Unsafe/ZstdDecompress.cs
index 36fe2b8..f298345 100644
--- a/src/ZstdSharp/Unsafe/ZstdDecompress.cs
+++ b/src/ZstdSharp/Unsafe/ZstdDecompress.cs
@@ -1780,7 +1780,7 @@ public static nuint ZSTD_freeDStream(ZSTD_DCtx_s* zds)
         /* ***  Initialization  *** */
         public static nuint ZSTD_DStreamInSize()
         {
-            return (1 << 17) + ZSTD_blockHeaderSize;
+            return (nuint)(1 << 17) + ZSTD_blockHeaderSize;
         }
 
         public static nuint ZSTD_DStreamOutSize()
diff --git a/src/ZstdSharp/Unsafe/ZstdInternal.cs b/src/ZstdSharp/Unsafe/ZstdInternal.cs
index c28476b..94852f3 100644
--- a/src/ZstdSharp/Unsafe/ZstdInternal.cs
+++ b/src/ZstdSharp/Unsafe/ZstdInternal.cs
@@ -14,7 +14,7 @@ public static unsafe partial class Methods
         public static readonly uint* repStartValue = GetArrayPointer(new uint[3] { 1, 4, 8 });
         public static readonly nuint* ZSTD_fcs_fieldSize = GetArrayPointer(new nuint[4] { 0, 2, 4, 8 });
         public static readonly nuint* ZSTD_did_fieldSize = GetArrayPointer(new nuint[4] { 0, 1, 2, 4 });
-        public const nuint ZSTD_blockHeaderSize = 3;
+        public const uint ZSTD_blockHeaderSize = 3;
         public static readonly byte* LL_bits = GetArrayPointer(new byte[36] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 });
         public static readonly short* LL_defaultNorm = GetArrayPointer(new short[36] { 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 1, 1, 1, 1, 1, -1, -1, -1, -1 });
         public const uint LL_defaultNormLog = 6;