diff --git a/Modules/Compiler/Tasking-C.cmake b/Modules/Compiler/Tasking-C.cmake
index 938f46e3a5..915090a120 100644
--- a/Modules/Compiler/Tasking-C.cmake
+++ b/Modules/Compiler/Tasking-C.cmake
@@ -2,13 +2,13 @@ include(Compiler/Tasking)
 __compiler_tasking(C)
 
 set(CMAKE_C90_STANDARD_COMPILE_OPTION "--iso=90" "--strict")
-set(CMAKE_C90_EXTENSION_COMPILE_OPTION "--iso=90" " ")
+set(CMAKE_C90_EXTENSION_COMPILE_OPTION "--iso=90")
 
 set(CMAKE_C99_STANDARD_COMPILE_OPTION "--iso=99" "--strict")
-set(CMAKE_C99_EXTENSION_COMPILE_OPTION "--iso=99" " ")
+set(CMAKE_C99_EXTENSION_COMPILE_OPTION "--iso=99")
 
 set(CMAKE_C11_STANDARD_COMPILE_OPTION "--iso=11" "--strict")
-set(CMAKE_C11_EXTENSION_COMPILE_OPTION "--iso=11" " ")
+set(CMAKE_C11_EXTENSION_COMPILE_OPTION "--iso=11")
 
 set(CMAKE_C_STANDARD_LATEST 11)
 
diff --git a/Modules/Compiler/Tasking-CXX.cmake b/Modules/Compiler/Tasking-CXX.cmake
index 20e007ff2a..1aa840abc7 100644
--- a/Modules/Compiler/Tasking-CXX.cmake
+++ b/Modules/Compiler/Tasking-CXX.cmake
@@ -4,13 +4,13 @@ include(Compiler/Tasking)
 __compiler_tasking(CXX)
 
 set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "--c++=03" "--strict")
-set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "--iso=03" " ")
+set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "--c++=03")
 
 set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "--c++=11" "--strict")
-set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "--c++=11" " ")
+set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "--c++=11")
 
 set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "--c++=14" "--strict")
-set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "--c++=14" " ")
+set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "--c++=14")
 
 set(CMAKE_CXX_STANDARD_LATEST 14)