diff --git a/meta/classes/cmake.bbclass b/meta/classes/cmake.bbclass
index dcd974a..ac5c048 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -19,10 +19,10 @@ OECMAKE_C_COMPILER ?= "`echo ${CC} | sed 's/^\([^ ]*\).*/\1/'`"
 OECMAKE_CXX_COMPILER ?= "`echo ${CXX} | sed 's/^\([^ ]*\).*/\1/'`"
 
 # Compiler flags
-OECMAKE_C_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CPPFLAGS}"
+OECMAKE_C_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CFLAGS}"
 OECMAKE_CXX_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CXXFLAGS} -fpermissive"
-OECMAKE_C_FLAGS_RELEASE ?= "${SELECTED_OPTIMIZATION} ${CPPFLAGS} -DNDEBUG"
-OECMAKE_CXX_FLAGS_RELEASE ?= "${SELECTED_OPTIMIZATION} ${CXXFLAGS} -DNDEBUG"
+OECMAKE_C_FLAGS_RELEASE ?= "${CFLAGS} -DNDEBUG"
+OECMAKE_CXX_FLAGS_RELEASE ?= "${CXXFLAGS} -DNDEBUG"
 
 OECMAKE_RPATH ?= ""
 OECMAKE_PERLNATIVE_DIR ??= ""