diff --git a/protocol/Makefile b/protocol/Makefile
index 43bb0eea..9d7be265 100644
--- a/protocol/Makefile
+++ b/protocol/Makefile
@@ -1,6 +1,9 @@
 protocol.pdf: protocol.tex zcash.bib incremental_merkle.pdf key_components.pdf
 	$(MAKE) pdf
 
+sapling.pdf: protocol.tex zcash.bib incremental_merkle.pdf key_components.pdf
+	$(MAKE) sapling
+
 LATEX=pdflatex
 
 .PHONY: pdf
@@ -14,6 +17,20 @@ pdf:
 	$(LATEX) protocol.tex || { touch incremental_merkle.pdf; exit 1; }
 	$(LATEX) protocol.tex || { touch incremental_merkle.pdf; exit 1; }
 
+.PHONY: sapling
+sapling:
+	printf '\\toggletrue{issapling}\n\\renewcommand{\\docversion}{Version %s [Sapling]}' "$$(git describe --tags --abbrev=6)" |tee protocol.ver
+	# If $(LATEX) fails, touch an input so that 'make' won't think it is up-to-date next time.
+	rm -f sapling.aux sapling.bbl sapling.blg sapling.brf sapling.bcf
+	$(LATEX) -jobname=sapling protocol.tex || { touch incremental_merkle.pdf; exit 1; }
+	biber sapling
+	$(LATEX) -jobname=sapling protocol.tex || { touch incremental_merkle.pdf; exit 1; }
+	$(LATEX) -jobname=sapling protocol.tex || { touch incremental_merkle.pdf; exit 1; }
+	$(LATEX) -jobname=sapling protocol.tex || { touch incremental_merkle.pdf; exit 1; }
+
 .PHONY: clean
 clean:
-	rm -f protocol.dvi protocol.pdf protocol.bbl protocol.blg protocol.brf protocol.toc protocol.aux protocol.out protocol.log protocol.bcf protocol.run.xml protocol.ver
+	rm -f protocol.dvi protocol.pdf protocol.bbl protocol.blg protocol.brf     protocol.toc \
+              protocol.aux protocol.out protocol.log protocol.bcf protocol.run.xml protocol.ver \
+              sapling.dvi  sapling.pdf  sapling.bbl  sapling.blg  sapling.brf      sapling.toc \
+              sapling.aux  sapling.out  sapling.log  sapling.bcf  sapling.run.xml
diff --git a/protocol/protocol.tex b/protocol/protocol.tex
index b696673c..53e146ce 100644
--- a/protocol/protocol.tex
+++ b/protocol/protocol.tex
@@ -19,6 +19,7 @@
 \RequirePackage[unicode,bookmarksnumbered,bookmarksopen,pdfview=Fit]{hyperref}
 \RequirePackage{cleveref}
 \RequirePackage{nameref}
+\RequirePackage{etoolbox}
 
 \RequirePackage[style=alphabetic,maxbibnames=99,dateabbrev=false,urldate=iso8601,backref=true,backrefstyle=none,backend=biber]{biblatex}
 \addbibresource{zcash.bib}
@@ -81,6 +82,8 @@
 \setlist[formulae]{itemsep=0.2ex,topsep=0ex,leftmargin=1.5em,label=,after=\vspace{1.5ex}}
 
 \newcommand{\docversion}{Version unavailable (check protocol.ver)}
+\newtoggle{issapling}
+\togglefalse{issapling}
 \InputIfFileExists{protocol.ver}{}{}
 
 \newcommand{\doctitle}{Zcash Protocol Specification}
@@ -159,6 +162,16 @@ electronic commerce and payment, financial privacy, proof of work, zero knowledg
 \newcommand{\changedcolor}{magenta}
 \newcommand{\setchanged}{\color{\changedcolor}}
 \newcommand{\changed}[1]{\texorpdfstring{{\setchanged{#1}}}{#1}}
+\newcommand{\saplingcolor}{ForestGreen}
+\iftoggle{issapling}{
+  \newcommand{\sprout}[1]{}
+  \newcommand{\setsapling}{\color{\saplingcolor}}
+  \newcommand{\sapling}[1]{\texorpdfstring{{\setsapling{#1}}}{#1}}
+} {
+  \newcommand{\sprout}[1]{#1}
+  \newcommand{\setsapling}{}
+  \newcommand{\sapling}[1]{}
+}
 
 % terminology
 
@@ -761,8 +774,12 @@ address the problem of mining centralization by use of the Equihash
 memory-hard proof-of-work algorithm.
 
 \vspace{1.5ex}
-\noindent This specification defines the \Zcash consensus protocol and explains
-its differences from \Zerocash and \Bitcoin.
+\sprout{\noindent This specification defines the \Zcash consensus protocol and explains
+its differences from \Zerocash and \Bitcoin.}
+\sapling{\noindent This \em{draft} specification defines the next major
+version of the \Zcash consensus protocol, codenamed Sapling. It is
+a work in progress and should not be used as a reference for the current
+protocol.}
 
 \vspace{2.5ex}
 \noindent \textbf{Keywords:}~ \StrSubstitute[0]{\keywords}{,}{, }.