diff --git a/Zend/Zend.m4 b/Zend/Zend.m4
index 66880aab2314f..4c384e4109f41 100644
--- a/Zend/Zend.m4
+++ b/Zend/Zend.m4
@@ -177,9 +177,6 @@ AH_TEMPLATE([ZEND_DEBUG],
 AS_VAR_IF([ZEND_DEBUG], [yes], [
   AC_DEFINE([ZEND_DEBUG], [1])
   echo " $CFLAGS" | grep ' -g' >/dev/null || DEBUG_CFLAGS="-g"
-  if test "$CFLAGS" = "-g -O2"; then
-    CFLAGS=-g
-  fi
 ], [AC_DEFINE([ZEND_DEBUG], [0])])
 
 test -n "$GCC" && CFLAGS="-Wall -Wextra -Wno-unused-parameter -Wno-sign-compare $CFLAGS"