diff --git a/src/video_core/textures/astc.cpp b/src/video_core/textures/astc.cpp
index 5c65844dd..c15548d34 100644
--- a/src/video_core/textures/astc.cpp
+++ b/src/video_core/textures/astc.cpp
@@ -811,6 +811,8 @@ static void DecodeColorValues(u32* out, u8* data, const u32* modes, const u32 nP
 
     // We now have enough to decode our s32eger sequence.
     std::vector<IntegerEncodedValue> decodedColorValues;
+    decodedColorValues.reserve(32);
+
     InputBitStream colorStream(data);
     DecodeIntegerSequence(decodedColorValues, colorStream, range, nValues);