diff --git a/configure.in b/configure.in
index 7cbb0ac7cf4..6ea957dfde3 100644
--- a/configure.in
+++ b/configure.in
@@ -764,7 +764,7 @@ if test "$PHP_DEBUG" = "yes"; then
   changequote([,])
   dnl add -O0 only if GCC or ICC is used
   if test "$GCC" = "yes" || test "$ICC" = "yes"; then
-    CFLAGS="$CFLAGS -g -O0"
+    CFLAGS="$CFLAGS -O0"
     CXXFLAGS="$CXXFLAGS -g -O0"
   fi
   if test "$SUNCC" = "yes"; then
diff --git a/scripts/phpize.m4 b/scripts/phpize.m4
index 07e6037fbc0..e3a30a50c5c 100644
--- a/scripts/phpize.m4
+++ b/scripts/phpize.m4
@@ -111,7 +111,7 @@ if test "$PHP_DEBUG" = "yes"; then
   dnl add -O0 only if GCC or ICC is used
   if test "$GCC" = "yes" || test "$ICC" = "yes"; then
     CFLAGS="$CFLAGS -O0"
-    CXXFLAGS="$CXXFLAGS -O0"
+    CXXFLAGS="$CXXFLAGS -g -O0"
   fi
   if test "$SUNCC" = "yes"; then
     if test -n "$auto_cflags"; then