diff --git a/cmake/checks/cpu_neon.cpp b/cmake/checks/cpu_neon.cpp
index 30c144cdf8..6012bee165 100644
--- a/cmake/checks/cpu_neon.cpp
+++ b/cmake/checks/cpu_neon.cpp
@@ -2,7 +2,7 @@
 
 #if defined _WIN32 && (defined(_M_ARM) || defined(_M_ARM64) || defined(_M_ARM64EC))
 # define _ARM64_DISTINCT_NEON_TYPES
-# include <Intrin.h>
+# include <intrin.h>
 # include <arm_neon.h>
 # define CV_NEON 1
 #elif defined(__ARM_NEON)
diff --git a/modules/flann/include/opencv2/flann/dist.h b/modules/flann/include/opencv2/flann/dist.h
index 41c7f0e14d..8ce6465731 100644
--- a/modules/flann/include/opencv2/flann/dist.h
+++ b/modules/flann/include/opencv2/flann/dist.h
@@ -46,7 +46,7 @@ typedef unsigned __int64 uint64_t;
 #include "defines.h"
 
 #if defined _WIN32 && (defined(_M_ARM) || defined(_M_ARM64) || defined(_M_ARM64EC))
-# include <Intrin.h>
+# include <intrin.h>
 #endif
 
 #if defined(__ARM_NEON) && !defined(__CUDACC__)