diff --git a/makefile b/makefile
index ba1d9c76..9ea67426 100644
--- a/makefile
+++ b/makefile
@@ -503,7 +503,8 @@ ifeq ($(WIN32),)  #*nix Environments (&& cygwin)
         OS_LDFLAGS += -L$(dir $(call find_lib,pcreposix))
       endif
     endif
-  else
+  endif
+  ifeq (,$(findstring DHAVE_PCREPOSIX_H,$(OS_CCDEFS)))
     # If libpcreposix isn't available, fall back to the local regex.h 
     # Presume that the local regex support is available in the C runtime 
     # without a specific reference to a library.  This may not be true on