diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f499fbf..919e5ed8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -451,9 +451,9 @@ target_include_directories(OpenSTA
 
 target_compile_options(OpenSTA
   PRIVATE
-  $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -pedantic -Wcast-qual -Wredundant-decls -Wformat-security>
-  $<$<CXX_COMPILER_ID:AppleClang>:-Wall -Wextra -pedantic -Wcast-qual -Wredundant-decls -Wformat-security -Wno-deprecated-register>
-  $<$<CXX_COMPILER_ID:Clang>:-Wall -Wextra -pedantic -Wcast-qual -Wredundant-decls -Wformat-security -Wno-deprecated-register>
+  $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -pedantic -Wcast-qual -Wredundant-decls -Wformat-security -Wno-deprecated-register>
+  $<$<CXX_COMPILER_ID:AppleClang>:-Wall -Wextra -pedantic -Wcast-qual -Wredundant-decls -Wformat-security -Wno-register>
+  $<$<CXX_COMPILER_ID:Clang>:-Wall -Wextra -pedantic -Wcast-qual -Wredundant-decls -Wformat-security -Wno-register>
   )
 
 # Disable compiler specific extensions like gnu++11.