diff --git a/src/util/detect_arch.h b/src/util/detect_arch.h
index 8fa4bded62a..feeab69b48a 100644
--- a/src/util/detect_arch.h
+++ b/src/util/detect_arch.h
@@ -91,6 +91,10 @@
 #define DETECT_ARCH_AARCH64 1
 #endif
 
+#if defined(_M_ARM64EC)
+#define DETECT_ARCH_ARM64EC 1
+#endif
+
 #if defined(__mips64) && defined(__LP64__)
 #define DETECT_ARCH_MIPS64 1
 #endif
@@ -154,6 +158,10 @@
 #define DETECT_ARCH_AARCH64 0
 #endif
 
+#ifndef DETECT_ARCH_ARM64EC
+#define DETECT_ARCH_ARM64EC 0
+#endif
+
 #ifndef DETECT_ARCH_MIPS64
 #define DETECT_ARCH_MIPS64 0
 #endif