diff --git a/pcsx2/x86/iR3000A.cpp b/pcsx2/x86/iR3000A.cpp
index 618c2e4a4c..01344477b3 100644
--- a/pcsx2/x86/iR3000A.cpp
+++ b/pcsx2/x86/iR3000A.cpp
@@ -101,56 +101,59 @@ static void iopRecError(int err);
 static ZydisFormatterFunc s_old_print_address;
 static ZydisFormatterFunc s_old_print_disp;
 
-static int Address2Symbol(u64 address, char* buf)
+static bool Address2Symbol(u64 address, SmallString &buf)
 {
-	u32 len = 0;
 
 #define A(x) ((u64)(x))
 
 	if (address >= A(iopMem->Main) && address < A(iopMem->P))
 	{
-		len = sprintf(buf, "iopMem+0x%08X", static_cast<u32>(address - A(iopMem->Main)));
+		buf.append_format("iopMem+0x{:08X}", static_cast<u32>(address - A(iopMem->Main)));
 	}
 	else if (address >= A(&psxRegs.GPR) && address < A(&psxRegs.CP0))
 	{
-		len = sprintf(buf, "psxRegs.GPR.%s", R3000A::disRNameGPR[static_cast<u32>(address - A(&psxRegs)) / 4u]);
+		buf.append_format("psxRegs.GPR.{}", R3000A::disRNameGPR[static_cast<u32>(address - A(&psxRegs)) / 4u]);
 	}
 	else if (address == A(&psxRegs.pc))
 	{
-		len = sprintf(buf, "psxRegs.pc");
+		buf.append("psxRegs.pc");
 	}
 	else if (address == A(&psxRegs.cycle))
 	{
-		len = sprintf(buf, "psxRegs.cycle");
+		buf.append("psxRegs.cycle");
 	}
 	else if (address == A(&psxRegs.iopNextEventCycle))
 	{
-		len = sprintf(buf, "psxRegs.iopNextEventCycle");
+		buf.append("psxRegs.iopNextEventCycle");
+	}
+	else
+	{
+		return false;
 	}
 
 #undef A
 
-	return len;
+	return true;
 }
 
 static ZyanStatus ZydisFormatterPrintDisplacement(const ZydisFormatter* formatter,
 	ZydisFormatterBuffer* buffer, ZydisFormatterContext* context)
 {
-	char buf[128];
-	u32 len = 0;
 	u64 address = (u64)R3000A_TEXTPTR + context->operand->mem.disp.value;
+	bool did_print = false;
+	SmallString buf;
 
 	// hardcoded RTEXTPTR
 	if (context->operand->mem.base == ZYDIS_REGISTER_RBX) {
-		len = Address2Symbol(address, buf);
+		did_print = Address2Symbol(address, buf);
 	}
 
-	if (len > 0)
+	if (did_print)
 	{
 		ZYAN_CHECK(ZydisFormatterBufferAppend(buffer, ZYDIS_TOKEN_SYMBOL));
 		ZyanString* string;
 		ZYAN_CHECK(ZydisFormatterBufferGetString(buffer, &string));
-		return ZyanStringAppendFormat(string, "-%s+&%s", "R3000A_TEXTPTR", buf);
+		return ZyanStringAppendFormat(string, "-%s+&%s", "R3000A_TEXTPTR", buf.c_str());
 	}
 
 	return s_old_print_disp(formatter, buffer, context);
@@ -163,17 +166,17 @@ static ZyanStatus ZydisFormatterPrintAddressAbsolute(const ZydisFormatter* forma
 	ZYAN_CHECK(ZydisCalcAbsoluteAddress(context->instruction, context->operand,
 		context->runtime_address, &address));
 
-	char buf[128];
-	u32 len = 0;
+	SmallString buf;
+	bool did_print = false;
 
-	len = Address2Symbol(address, buf);
+	did_print = Address2Symbol(address, buf);
 
-	if (len > 0)
+	if (did_print)
 	{
 		ZYAN_CHECK(ZydisFormatterBufferAppend(buffer, ZYDIS_TOKEN_SYMBOL));
 		ZyanString* string;
 		ZYAN_CHECK(ZydisFormatterBufferGetString(buffer, &string));
-		return ZyanStringAppendFormat(string, "&%s", buf);
+		return ZyanStringAppendFormat(string, "&%s", buf.c_str());
 	}
 
 	return s_old_print_address(formatter, buffer, context);