diff --git a/GNUmakefile b/GNUmakefile
index 30057e943..13e567ffc 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -3,6 +3,9 @@ prefix?=/usr/local
 pkgconfigdir?=$(libdir)/pkgconfig
 PKG_CONFIG?=pkg-config
 
+GTKD_VERSION=3.11.0
+SO_VERSION=0
+
 OS=$(shell uname || uname -s)
 ARCH=$(shell uname -m || arch)
 
@@ -34,7 +37,7 @@ all: libs shared-libs test
 
 ifeq ("$(DC)","gdc")
     DCFLAGS?=-O2
-    LINKERFLAG?=
+    LINKERFLAG?=-Wl,
     DDOCFLAGS=-fsyntax-only -c -fdoc -fdoc-file=$@
     DDOCINC=-fdoc-inc=
     output=-o $@
@@ -78,9 +81,6 @@ ADRDOX?=adrdox
 
 #######################################################################
 
-GTKD_VERSION=3.10.0
-SO_VERSION=0
-
 MAJOR =  $(word 1,$(subst ., ,$(GTKD_VERSION)))
 MINOR =  $(word 2,$(subst ., ,$(GTKD_VERSION)))
 BUGFIX = $(word 3,$(subst ., ,$(GTKD_VERSION)))