diff --git a/configure.ac b/configure.ac
index 5ab386f..d512c01 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,14 +58,14 @@
 AC_ARG_ENABLE([virtual-pnor],
     AS_HELP_STRING([--enable-virtual-pnor], [Turn on virtual pnor])
 )
-AS_IF([test "x$enable_virtual_pnor" == "xno"],
-    [
-        AM_CONDITIONAL(VIRTUAL_PNOR_ENABLED, false)
-    ],
+AS_IF([test "x$enable_virtual_pnor" == "xyes"],
     [
         AM_CONDITIONAL(VIRTUAL_PNOR_ENABLED, true)
         AX_APPEND_COMPILE_FLAGS([-DVIRTUAL_PNOR_ENABLED], [CXXFLAGS])
         AX_APPEND_COMPILE_FLAGS([-DVIRTUAL_PNOR_ENABLED], [CFLAGS])
+    ],
+    [
+        AM_CONDITIONAL(VIRTUAL_PNOR_ENABLED, false)
     ]
 )