diff --git a/src/zig_clang.h b/src/zig_clang.h
index 0e0582a08a0626df23971ed098ac7378eada0c71..f938d8b56e521bf651bb254503cdf8bd068a3af1 100644
--- a/src/zig_clang.h
+++ b/src/zig_clang.h
@@ -52,6 +52,8 @@ struct ZigClangAPValue {
     // experimentally-derived size of clang::APValue::DataType
 #if defined(_WIN32) && defined(_MSC_VER)
     char Data[52];
+#elif defined(__i386__)
+    char Data[48];
 #else
     char Data[68];
 #endif