diff --git a/Source/astcenccli_platform_dependents.cpp b/Source/astcenccli_platform_dependents.cpp
index f51779c4..034cb16e 100644
--- a/Source/astcenccli_platform_dependents.cpp
+++ b/Source/astcenccli_platform_dependents.cpp
@@ -153,7 +153,7 @@ void set_thread_name(
 	// Names are limited to 16 characters
 	wchar_t wname [17] { 0 };
 	size_t name_len = std::strlen(name);
-	size_t clamp_len = std::min(name_len, 16);
+	size_t clamp_len = std::min(name_len, static_cast<size_t>(16));
 
 	// We know we only have basic 7-bit ASCII so just widen
 	for (size_t i = 0; i < clamp_len; i++)