diff --git a/configure b/configure
index 1ae0ec95c..4a10df199 100755
--- a/configure
+++ b/configure
@@ -9255,3 +9255,7 @@ fi
 echo "  NMAP IS A POWERFUL TOOL -- USE CAREFULLY AND RESPONSIBLY"
 
 echo "Configuration complete.  Type make (or gmake on some *BSD machines) to compile."
+
+if test "$use_openssl" = "no" && test "$with_openssl" != "no"; then
+  echo "WARNING: You are compiling without OpenSSL $use_openssl $with_openssl"
+fi
diff --git a/configure.ac b/configure.ac
index aadc2603f..b1f02399d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -989,3 +989,7 @@ fi
 echo "  NMAP IS A POWERFUL TOOL -- USE CAREFULLY AND RESPONSIBLY"
 
 echo "Configuration complete.  Type make (or gmake on some *BSD machines) to compile."
+
+if test "x$use_openssl" = "xno" && test "x$with_openssl" != "xno"; then
+  echo "WARNING: You are compiling without OpenSSL"
+fi