diff --git a/Source/Core/VideoBackends/D3D/Render.cpp b/Source/Core/VideoBackends/D3D/Render.cpp
index 67046ecf91..1ce0d1191e 100644
--- a/Source/Core/VideoBackends/D3D/Render.cpp
+++ b/Source/Core/VideoBackends/D3D/Render.cpp
@@ -8,6 +8,7 @@
 #include <strsafe.h>
 #include <unordered_map>
 
+#include "Common/MathUtil.h"
 #include "Common/Timer.h"
 
 #include "Core/ConfigManager.h"
@@ -419,11 +420,11 @@ u32 Renderer::AccessEFB(EFBAccessType type, u32 x, u32 y, u32 poke_data)
 		if (bpmem.zcontrol.pixel_format == PEControl::RGB565_Z16)
 		{
 			// if Z is in 16 bit format you must return a 16 bit integer
-			ret = ((u32)(val * 65536.0f));
+			ret = MathUtil::Clamp<u32>((u32)(val * 65536.0f), 0, 0xFFFF);
 		}
 		else
 		{
-			ret = ((u32)(val * 16777216.0f));
+			ret = MathUtil::Clamp<u32>((u32)(val * 16777216.0f), 0, 0xFFFFFF);
 		}
 		D3D::context->Unmap(read_tex, 0);
 
diff --git a/Source/Core/VideoBackends/OGL/Render.cpp b/Source/Core/VideoBackends/OGL/Render.cpp
index 638192df44..50a166e2da 100644
--- a/Source/Core/VideoBackends/OGL/Render.cpp
+++ b/Source/Core/VideoBackends/OGL/Render.cpp
@@ -12,6 +12,7 @@
 #include "Common/Atomic.h"
 #include "Common/CommonPaths.h"
 #include "Common/FileUtil.h"
+#include "Common/MathUtil.h"
 #include "Common/StringUtil.h"
 #include "Common/Thread.h"
 #include "Common/Timer.h"
@@ -940,7 +941,7 @@ void Renderer::UpdateEFBCache(EFBAccessType type, u32 cacheRectIdx, const EFBRec
 			if (type == PEEK_Z)
 			{
 				float* ptr = (float*)data;
-				value = (u32)(ptr[yData * targetPixelRcWidth + xData] * 16777216.0f);
+				value = MathUtil::Clamp<u32>((u32)(ptr[yData * targetPixelRcWidth + xData] * 16777216.0f), 0, 0xFFFFFF);
 			}
 			else
 			{