--- a/configure.ac
+++ b/configure.ac
@@ -19,23 +19,28 @@
 FOUND_IMLIB=0
 FOUND_GTK2=0
 
-AC_PATH_PROG(gtkconf, gtk-config, no)
-if test -n "$gtkconf"; then
-  vers=`$gtkconf --version 2>/dev/null | awk 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
-  if test -n "$vers" && test "$vers" -ge 1002009; then
-    GTK_LIBS="`$gtkconf --libs`"
-    GTK_CFLAGS="`$gtkconf --cflags`"
-    AC_SUBST(GTK_LIBS)
-    AC_SUBST(GTK_CFLAGS)
-    FOUND_GTK1=1
+AC_ARG_ENABLE([gtk1],
+	AS_HELP_STRING([--enable-gtk1],[Enable Gtk+1 engine (default=yes)]),
+	[enable_gtk1=$enableval],
+	[enable_gtk1=yes])
+
+if test x$enable_gtk1 = xyes; then
+  AC_PATH_PROG(gtkconf, gtk-config, no)
+  if test -n "$gtkconf"; then
+    vers=`$gtkconf --version 2>/dev/null | awk 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
+    if test -n "$vers" && test "$vers" -ge 1002009; then
+      GTK_LIBS="`$gtkconf --libs`"
+      GTK_CFLAGS="`$gtkconf --cflags`"
+      AC_SUBST(GTK_LIBS)
+      AC_SUBST(GTK_CFLAGS)
+      FOUND_GTK1=1
+    else
+      AC_MSG_ERROR([Not compiling for GTK1.x - you need at least Gtk v1.2.9])
+    fi
   else
-    AC_MSG_WARN([Not compiling for GTK1.x - you need at least Gtk v1.2.9])
+    AC_MSG_ERROR([Not compiling for GTK1.x - Gtk1.x not installed, need at least v1.2.9])
   fi
-else
-  AC_MSG_WARN([Not compiling for GTK1.x - Gtk1.x not installed, need at least v1.2.9])
-fi
 
-if test $FOUND_GTK1 -eq 1; then
   AC_PATH_PROG(imlibconf, imlib-config, no)
   if test -n "$imlibconf"; then
     vers=`$imlibconf --version 2>/dev/null | awk 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
@@ -46,29 +51,36 @@
       AC_SUBST(GDK_IMLIB_CFLAGS)
       FOUND_IMLIB=1
     else
-      AC_MSG_WARN([Not compiling for GTK1.x - you need at least IMLIB v1.8.0])
+      AC_MSG_ERROR([Not compiling for GTK1.x - you need at least IMLIB v1.8.0])
     fi
   else
-    AC_MSG_WARN([Not compiling for GTK1.x - IMLIB not installed, need at least v1.8.0])
+    AC_MSG_ERROR([Not compiling for GTK1.x - IMLIB not installed, need at least v1.8.0])
   fi
 fi
 
 
-AC_PATH_PROG(pkgconfig, pkg-config, no)
-if test -n "$pkg-config"; then
-  GTK2_VERSION=`$pkgconfig --variable=gtk_binary_version gtk+-2.0`
-  if test -n "$GTK2_VERSION"; then
-    GTK2_CFLAGS=`$pkgconfig gtk+-2.0 --cflags`
-    GTK2_LIBS=`$pkgconfig gtk+-2.0 --libs`
-    AC_SUBST(GTK2_CFLAGS)
-    AC_SUBST(GTK2_LIBS)
-    AC_SUBST(GTK2_VERSION)
-    FOUND_GTK2=1
+AC_ARG_ENABLE([gtk2],
+	AS_HELP_STRING([--enable-gtk2],[Enable Gtk+2 engine (default=yes)]),
+	[enable_gtk2=$enableval],
+	[enable_gtk2=yes])
+
+if test x$enable_gtk2 = xyes; then
+  AC_PATH_PROG(pkgconfig, pkg-config, no)
+  if test -n "$pkg-config"; then
+    GTK2_VERSION=`$pkgconfig --variable=gtk_binary_version gtk+-2.0`
+    if test -n "$GTK2_VERSION"; then
+      GTK2_CFLAGS=`$pkgconfig gtk+-2.0 --cflags`
+      GTK2_LIBS=`$pkgconfig gtk+-2.0 --libs`
+      AC_SUBST(GTK2_CFLAGS)
+      AC_SUBST(GTK2_LIBS)
+      AC_SUBST(GTK2_VERSION)
+      FOUND_GTK2=1
+    else
+      AC_MSG_ERROR([Not compiling for GTK2.x - Gtk2.x not installed])
+    fi
   else
-    AC_MSG_WARN([Not compiling for GTK2.x - Gtk2.x not installed])
+    AC_MSG_ERROR([Not compiling for GTK2.x - pkg-config not installed])
   fi
-else
-  AC_MSG_WARN([Not compiling for GTK2.x - pkg-config not installed])
 fi
 
 if (test $FOUND_IMLIB -eq 0) && (test $FOUND_GTK2 -eq 0); then