diff --git a/src/components/filters/CMakeLists.txt b/src/components/filters/CMakeLists.txt
index e2b9ea07..f9f2a155 100644
--- a/src/components/filters/CMakeLists.txt
+++ b/src/components/filters/CMakeLists.txt
@@ -1,5 +1,13 @@
 add_library(vbam-components-filters OBJECT)
 
+unset(extra_src)
+if(WINXP)
+    list(APPEND extra_src
+        ${CMAKE_SOURCE_DIR}/third_party/quake3-sqrt/quake3-sqrt.h
+    )
+    target_include_directories(vbam-components-filters PRIVATE ${CMAKE_SOURCE_DIR}/third_party/quake3-sqrt)
+endif()
+
 target_sources(vbam-components-filters
     PRIVATE
     internal/2xSaI.cpp
@@ -17,6 +25,7 @@ target_sources(vbam-components-filters
     internal/xBRZ/xbrz_config.h
     internal/xBRZ/xbrz_tools.h
     internal/xbrzfilter.cpp
+    ${extra_src}
 
     PUBLIC
     filters.h
diff --git a/src/components/filters/internal/xBRZ/xbrz.cpp b/src/components/filters/internal/xBRZ/xbrz.cpp
index 27f50b48..35b5d4cf 100644
--- a/src/components/filters/internal/xBRZ/xbrz.cpp
+++ b/src/components/filters/internal/xBRZ/xbrz.cpp
@@ -21,6 +21,10 @@
 #include <cmath> //std::sqrt
 #include "xbrz_tools.h"
 
+#ifdef WINXP
+#include "quake3-sqrt.h"
+#endif
+
 // some gcc versions lie about having this C++17 feature
 #define static_assert(x) static_assert(x, "assertion failed")
 
@@ -66,7 +70,9 @@ uint32_t gradientARGB(uint32_t pixFront, uint32_t pixBack) //find intermediate c
 
 inline double fastSqrt(double n)
 {
-#if (defined(__GNUC__) || defined(__clang__)) && (defined(__x86_64__) || defined(__i386__))
+#ifdef WINXP
+    return quake3_sqrt((float)n);
+#elif (defined(__GNUC__) || defined(__clang__)) && (defined(__x86_64__) || defined(__i386__))
     __asm__ ("fsqrt" : "+t" (n));
     return n;
 #elif defined(_MSC_VER) && defined(_M_IX86)