diff --git a/Source/Core/Core/Debugger/PPCDebugInterface.cpp b/Source/Core/Core/Debugger/PPCDebugInterface.cpp
index d93f369ac3..473509a67c 100644
--- a/Source/Core/Core/Debugger/PPCDebugInterface.cpp
+++ b/Source/Core/Core/Debugger/PPCDebugInterface.cpp
@@ -7,9 +7,10 @@
 #include <cstddef>
 #include <string>
 
+#include <fmt/format.h>
+
 #include "Common/Align.h"
 #include "Common/GekkoDisassembler.h"
-#include "Common/StringUtil.h"
 
 #include "Core/Core.h"
 #include "Core/HW/DSP.h"
@@ -199,7 +200,7 @@ std::string PPCDebugInterface::GetRawMemoryString(int memory, u32 address)
     const bool is_aram = memory != 0;
 
     if (is_aram || PowerPC::HostIsRAMAddress(address))
-      return StringFromFormat("%08X%s", ReadExtraMemory(memory, address), is_aram ? " (ARAM)" : "");
+      return fmt::format("{:08X}{}", ReadExtraMemory(memory, address), is_aram ? " (ARAM)" : "");
 
     return is_aram ? "--ARAM--" : "--------";
   }
diff --git a/Source/Core/Core/HW/DSPLLE/DSPDebugInterface.cpp b/Source/Core/Core/HW/DSPLLE/DSPDebugInterface.cpp
index 9ec83289a8..8ea752fddd 100644
--- a/Source/Core/Core/HW/DSPLLE/DSPDebugInterface.cpp
+++ b/Source/Core/Core/HW/DSPLLE/DSPDebugInterface.cpp
@@ -7,8 +7,9 @@
 #include <cstddef>
 #include <string>
 
+#include <fmt/format.h>
+
 #include "Common/MsgHandler.h"
-#include "Common/StringUtil.h"
 #include "Core/DSP/DSPCore.h"
 #include "Core/DSP/DSPMemoryMap.h"
 #include "Core/HW/DSPLLE/DSPSymbols.h"
@@ -156,7 +157,7 @@ std::string DSPDebugInterface::GetRawMemoryString(int memory, u32 address)
     {
     case 0:
     case 0x8:
-      return StringFromFormat("%04x", dsp_imem_read(address));
+      return fmt::format("{:04x}", dsp_imem_read(address));
     default:
       return "--IMEM--";
     }
@@ -166,9 +167,9 @@ std::string DSPDebugInterface::GetRawMemoryString(int memory, u32 address)
     {
     case 0:
     case 1:
-      return StringFromFormat("%04x (DMEM)", dsp_dmem_read(address));
+      return fmt::format("{:04x} (DMEM)", dsp_dmem_read(address));
     case 0xf:
-      return StringFromFormat("%04x (MMIO)", g_dsp.ifx_regs[address & 0xFF]);
+      return fmt::format("{:04x} (MMIO)", g_dsp.ifx_regs[address & 0xFF]);
     default:
       return "--DMEM--";
     }