diff --git a/daemon/configure.ac b/daemon/configure.ac
index 6d2c7b970ab2ddb5a3cd3e42a6e45acf6cc43159..3bde0a30a31300cd4de42e7a61f2ed3c3c5ea7fa 100644
--- a/daemon/configure.ac
+++ b/daemon/configure.ac
@@ -568,7 +568,7 @@ dnl debug mode is default-disabled
 AC_ARG_ENABLE([debug], AS_HELP_STRING([--enable-debug], [Build in debug mode, adds stricter warnings, disables optimization]))
 
 AS_IF([test "x$enable_debug" = "xyes"],
-      [CXXFLAGS="${CXXFLAGS} -g -Wno-return-type -Wall -Wextra -Wnon-virtual-dtor -O0"])
+      [CXXFLAGS="${CXXFLAGS} -g -Wall -Wextra -Wnon-virtual-dtor -O0"])
 
 dnl What Makefiles to generate