diff --git a/third_party/kissfft/CMakeLists.txt b/third_party/kissfft/CMakeLists.txt
index 0213798fa..9a0ab4d00 100644
--- a/third_party/kissfft/CMakeLists.txt
+++ b/third_party/kissfft/CMakeLists.txt
@@ -98,7 +98,7 @@ endif()
 if(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang|AppleClang")
     add_compile_options(-ffast-math -fomit-frame-pointer
         -W -Wall -Wcast-align -Wcast-qual -Wshadow -Wwrite-strings
-        "$<$<COMPILE_LANGUAGE:C>:-Wstrict-prototypes;-Wmissing-prototypes;-Wnested-externs;-Wbad-function-cast>")
+        $<$<COMPILE_LANGUAGE:C>:-Wstrict-prototypes;-Wmissing-prototypes;-Wnested-externs;-Wbad-function-cast>)
 endif()
 
 #
diff --git a/third_party/kissfft/build.cmake b/third_party/kissfft/build.cmake
index 1ca886d2a..413e226e6 100644
--- a/third_party/kissfft/build.cmake
+++ b/third_party/kissfft/build.cmake
@@ -88,8 +88,8 @@ target_include_directories(kissfft PUBLIC
 
 if(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang|AppleClang")
     target_compile_options(kissfft PRIVATE
-        "$<$<COMPILE_LANGUAGE:CXX>:-ffast-math -fomit-frame-pointer -W -Wall -Wcast-align -Wcast-qual -Wwrite-strings>"
-        "$<$<COMPILE_LANGUAGE:C>:-Wstrict-prototypes;-Wmissing-prototypes;-Wnested-externs;-Wbad-function-cast>")
+        $<$<COMPILE_LANGUAGE:CXX>:-ffast-math -fomit-frame-pointer -W -Wall -Wcast-align -Wcast-qual -Wwrite-strings>
+        $<$<COMPILE_LANGUAGE:C>:-Wstrict-prototypes;-Wmissing-prototypes;-Wnested-externs;-Wbad-function-cast>)
 endif()
 
 #