diff --git a/configure.in b/configure.in
index 6465b648db..d3645a7094 100644
--- a/configure.in
+++ b/configure.in
@@ -1256,6 +1256,18 @@ dnl ========================================================
 
 MOZ_ANDROID_STLPORT
 
+dnl ========================================================
+dnl = Nightly build
+dnl ========================================================
+MOZ_ARG_ENABLE_BOOL(nightly-build,
+[  --enable-nightly-build       Enable Nightly build (default=no)],
+    NIGHTLY_BUILD=1,
+    NIGHTLY_BUILD= )
+if test -n "$NIGHTLY_BUILD"; then
+    AC_DEFINE(NIGHTLY_BUILD)
+fi
+AC_SUBST(NIGHTLY_BUILD)
+
 dnl ========================================================
 dnl Suppress Clang Argument Warnings
 dnl ========================================================
diff --git a/js/src/configure.in b/js/src/configure.in
index 605617891f..79924d9389 100644
--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -1034,6 +1034,18 @@ dnl ========================================================
 
 MOZ_ANDROID_STLPORT
 
+dnl ========================================================
+dnl = Nightly build
+dnl ========================================================
+MOZ_ARG_ENABLE_BOOL(nightly-build,
+[  --enable-nightly-build       Enable Nightly build (default=no)],
+    NIGHTLY_BUILD=1,
+    NIGHTLY_BUILD= )
+if test -n "$NIGHTLY_BUILD"; then
+    AC_DEFINE(NIGHTLY_BUILD)
+fi
+AC_SUBST(NIGHTLY_BUILD)
+
 dnl ========================================================
 dnl Suppress Clang Argument Warnings
 dnl ========================================================