diff --git a/cmake/target_arch_detect.cpp b/cmake/target_arch_detect.cpp
index 8053e3532e5..0a2d0f3e648 100644
--- a/cmake/target_arch_detect.cpp
+++ b/cmake/target_arch_detect.cpp
@@ -5,6 +5,8 @@
 #error CMAKE_TARGET_ARCH_i686
 #elif defined(__x86_64__) || defined(_M_X64)
 #error CMAKE_TARGET_ARCH_x86_64
+#elif defined(__ARM_ARCH)
+#error CMAKE_TARGET_ARCH_arm
 #else
 #error CMAKE_TARGET_ARCH_unknown
 #endif