diff --git a/src/arm/CMakeLists.txt b/src/arm/CMakeLists.txt
index 3eaa2d0d3..a86f0bea1 100644
--- a/src/arm/CMakeLists.txt
+++ b/src/arm/CMakeLists.txt
@@ -1,7 +1,6 @@
 include(ExportDirectory)
 set(SOURCE_FILES
 	arm.c
-	core.c
 	decoder-arm.c
 	decoder.c
 	decoder-thumb.c