diff --git a/Makefile b/Makefile
index 6b64759ebdd..01c04d0485f 100644
--- a/Makefile
+++ b/Makefile
@@ -27,6 +27,8 @@ ifeq "$(HAVE_GCC)" "1"
 	# Enable even more warnings...
 	CXXFLAGS+= -Wpointer-arith -Wcast-qual
 	CXXFLAGS+= -Wshadow -Wimplicit -Wnon-virtual-dtor -Wwrite-strings
+	# Warn if global constructors are used.
+	CXXFLAGS+= -Wglobal-constructors
 
 	# Currently we disable this gcc flag, since it will also warn in cases,
 	# where using GCC_PRINTF (means: __attribute__((format(printf, x, y))))