diff --git a/common/patches/sof.cpp b/common/patches/sof.cpp
index 7569b4c5d..bb310a76c 100644
--- a/common/patches/sof.cpp
+++ b/common/patches/sof.cpp
@@ -1116,7 +1116,10 @@ namespace SoF
 		}
 		OUT(deity);
 		OUT(intoxication);
+
 		OUT_array(spellSlotRefresh, spells::SPELL_GEM_COUNT);
+		eq->spellSlotRefresh[9] = 0; // 10th slot is not valid in this release
+
 		OUT(abilitySlotRefresh);
 		OUT(points); // Relocation Test
 		//	OUT(unknown0166[4]);
@@ -1177,7 +1180,10 @@ namespace SoF
 		}
 
 		//	OUT(unknown4184[128]);
+
 		OUT_array(mem_spells, spells::SPELL_GEM_COUNT);
+		eq->mem_spells[9] = 0xFFFFFFFFU; // 10th slot is not valid in this release
+
 		//	OUT(unknown04396[32]);
 		OUT(platinum);
 		OUT(gold);
diff --git a/common/patches/sof_limits.h b/common/patches/sof_limits.h
index 399ff8c1a..a03676f2d 100644
--- a/common/patches/sof_limits.h
+++ b/common/patches/sof_limits.h
@@ -328,7 +328,11 @@ namespace SoF
 
 		const int SPELL_ID_MAX = 15999;
 		const int SPELLBOOK_SIZE = 480;
+		// Be careful not to confuse these two..SoF disc release has a special requirement...
+		// - The number of available spell gems HAS NOT increased from 9 at this point
+		// - The profile allocation HAS increased to 10 at this point
 		const int SPELL_GEM_COUNT = static_cast<uint32>(CastingSlot::MaxGems);
+		const int SPELL_GEM_PROFILE_SIZE = 10; // special case declaration
 		
 		const int LONG_BUFFS = 25;
 		const int SHORT_BUFFS = 15;
diff --git a/common/patches/sof_structs.h b/common/patches/sof_structs.h
index 93b185e23..4d4a591e1 100644
--- a/common/patches/sof_structs.h
+++ b/common/patches/sof_structs.h
@@ -885,7 +885,7 @@ struct PlayerProfile_Struct //23576 Octets
 /*00060*/ BindStruct binds[5];			// Bind points (primary is first)
 /*00160*/ uint32  deity;				// deity
 /*00164*/ uint32  intoxication;			// Alcohol level (in ticks till sober?)
-/*00168*/ uint32  spellSlotRefresh[spells::SPELL_GEM_COUNT]; // Refresh time (millis) - 4 Octets Each
+/*00168*/ uint32  spellSlotRefresh[spells::SPELL_GEM_PROFILE_SIZE]; // Refresh time (millis) - 4 Octets Each
 /*00208*/ uint32  abilitySlotRefresh;
 /*00212*/ uint8   haircolor;			// Player hair color
 /*00213*/ uint8   beardcolor;			// Player beard color
@@ -912,7 +912,7 @@ struct PlayerProfile_Struct //23576 Octets
 /*04173*/ uint8 unknown02264[147];		// was [139]
 /*04312*/ uint32   spell_book[spells::SPELLBOOK_SIZE];	// List of the Spells in spellbook 480 = 60 pages
 /*06232*/ uint8   unknown4184[128];		// was [136]
-/*06396*/ uint32   mem_spells[spells::SPELL_GEM_COUNT]; // List of spells memorized
+/*06396*/ uint32   mem_spells[spells::SPELL_GEM_PROFILE_SIZE]; // List of spells memorized
 /*06436*/ uint8 unknown04396[28];		//#### uint8 unknown04396[32]; in Titanium ####[28]
 /*06464*/ uint32  platinum;				// Platinum Pieces on player
 /*06468*/ uint32  gold;					// Gold Pieces on player
@@ -3768,7 +3768,7 @@ struct AnnoyingZoneUnknown_Struct {
 };
 
 struct LoadSpellSet_Struct {
-	uint32 spell[spells::SPELL_GEM_COUNT];
+	uint32 spell[spells::SPELL_GEM_PROFILE_SIZE];
 	uint32 unknown;
 };