diff --git a/mkspecs/mkspecs.cmake b/mkspecs/mkspecs.cmake
index 794c5c1f6..af5bf1011 100644
--- a/mkspecs/mkspecs.cmake
+++ b/mkspecs/mkspecs.cmake
@@ -87,7 +87,7 @@ if(KATIE_ARCHITECTURE STREQUAL "auto")
         set(KATIE_ARCHITECTURE "i386")
     elseif(LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64|amd64)")
         set(KATIE_ARCHITECTURE "x86_64")
-    elseif()
+    else()
         message(FATAL_ERROR "Unknown CPU '${CMAKE_SYSTEM_PROCESSOR}'")
     endif()
 endif()