diff --git a/pcsx2/x86/BaseblockEx.h b/pcsx2/x86/BaseblockEx.h
index 2a19ca088c..d61b78a84e 100644
--- a/pcsx2/x86/BaseblockEx.h
+++ b/pcsx2/x86/BaseblockEx.h
@@ -230,6 +230,12 @@ public:
 
 #define PC_GETBLOCK_(x, reclut) ((BASEBLOCK*)(reclut[((u32)(x)) >> 16] + (x)*(sizeof(BASEBLOCK)/4)))
 
+/**
+ * Add a page to the recompiler lookup table
+ *
+ * Will associate `reclut[pagebase + pageidx]` with `mapbase[mappage << 14]`
+ * Will associate `hwlut[pagebase + pageidx]` with `pageidx << 16`
+ */
 static void recLUT_SetPage(uptr reclut[0x10000], u32 hwlut[0x10000],
 						   BASEBLOCK *mapbase, uint pagebase, uint pageidx, uint mappage)
 {