diff --git a/microscript/ILibDuktape_Polyfills.c b/microscript/ILibDuktape_Polyfills.c
index b8abe27..a150db5 100644
--- a/microscript/ILibDuktape_Polyfills.c
+++ b/microscript/ILibDuktape_Polyfills.c
@@ -1955,7 +1955,7 @@ void ILibDuktape_dataGenerator_onResume(struct ILibDuktape_readableStream *sende
 		SHA256_Init(&shctx);
 		SHA256_Update(&shctx, buffer + UTIL_SHA256_HASHSIZE, bufferLen - UTIL_SHA256_HASHSIZE);
 		SHA256_Final((unsigned char*)buffer, &shctx);
-		ILibDuktape_readableStream_WriteData(sender, buffer, bufferLen);
+		ILibDuktape_readableStream_WriteData(sender, buffer, (int)bufferLen);
 	}
 }
 duk_ret_t ILibDuktape_dataGenerator_const(duk_context *ctx)
diff --git a/microstack/ILibSimpleDataStore.c b/microstack/ILibSimpleDataStore.c
index 662d95d..ef5b11f 100644
--- a/microstack/ILibSimpleDataStore.c
+++ b/microstack/ILibSimpleDataStore.c
@@ -36,7 +36,7 @@ limitations under the License.
 	#define ILibSimpleDataStore_SeekPosition(filePtr, position, seekMode) _fseeki64(filePtr, position, seekMode)
 #else
 	#define ILibSimpleDataStore_GetPosition(filePtr) ftell(filePtr)
-	#define ILibSimpleDataStore_SeekPosition(filePtr, position, seekMode) fseek(filePtr, position, seekMode)
+	#define ILibSimpleDataStore_SeekPosition(filePtr, position, seekMode) fseek(filePtr, (long)position, seekMode)
 #endif
 
 typedef struct ILibSimpleDataStore_Root
@@ -158,7 +158,7 @@ ILibSimpleDataStore_RecordHeader_NG* ILibSimpleDataStore_ReadNextRecord(ILibSimp
 	}
 
 	i = (int)fread((void*)node, 1, nodeSize, root->dataFile);
-	if (i < nodeSize) return NULL;
+	if (i < (int)nodeSize) return NULL;
 
 
 	// Correct the struct, valueHash stays the same