diff --git a/makefile.shared b/makefile.shared
index 47c35d9..cebaa04 100644
--- a/makefile.shared
+++ b/makefile.shared
@@ -1,7 +1,8 @@
 #makefile for TomsFastMath
 #
 #
-VERSION=1:0:0
+VERSION=0.13.1
+VERSION_LIB=1:0:0
 
 LT  ?= libtool
 LTCOMPILE = $(LT) --mode=compile --tag=CC $(CC)
@@ -89,13 +90,16 @@ $(OBJECTS): $(HEADERS)
 	$(LTCOMPILE) $(CFLAGS) $(LDFLAGS) -o $@ -c $<
 
 $(LIBNAME): $(OBJECTS)
-	libtool --mode=link --tag=CC $(CC) $(CFLAGS) $(LDFLAGS) `find . -type f | LC_ALL=C sort | grep "[.]lo" | xargs` -o $(LIBNAME) -rpath $(LIBPATH) -version-info $(VERSION) -export-symbols libtfm.symbols
+	libtool --mode=link --tag=CC $(CC) $(CFLAGS) $(LDFLAGS) `find . -type f | LC_ALL=C sort | grep "[.]lo" | xargs` -o $(LIBNAME) -rpath $(LIBPATH) -version-info $(VERSION_LIB) -export-symbols libtfm.symbols
 
 install: $(LIBNAME)
 	install -d -g $(GROUP) -o $(USER) $(DESTDIR)$(LIBPATH)
 	libtool --mode=install install -c $(LIBNAME) $(DESTDIR)$(LIBPATH)/$(LIBNAME)
 	install -d -g $(GROUP) -o $(USER) $(DESTDIR)$(INCPATH)
 	install -g $(GROUP) -o $(USER) $(HEADERS_PUB) $(DESTDIR)$(INCPATH)
+	sed -e 's,^Version:.*,Version: $(VERSION),' tomsfastmath.pc.in > tomsfastmath.pc
+	install -d $(DESTDIR)$(LIBPATH)/pkgconfig
+	install -m 644 tomsfastmath.pc $(DESTDIR)$(LIBPATH)/pkgconfig/
 
 HEADER_FILES=$(notdir $(HEADERS_PUB))
 uninstall:
diff --git a/tomsfastmath.pc.in b/tomsfastmath.pc.in
new file mode 100644
index 0000000..a0275ab
--- /dev/null
+++ b/tomsfastmath.pc.in
@@ -0,0 +1,7 @@
+# TomsFastMath, a fast ISO C bignum library. -- Tom St Denis
+# SPDX-License-Identifier: Unlicense
+
+Name: TomFastMath
+Description: Fast multiple-precision integer library
+Version: @VERSION@
+Libs: -ltfm