diff --git a/src/Makefile.am b/src/Makefile.am
index 676ae91..a8ccaca 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -25,7 +25,7 @@ libproj_la_LDFLAGS = -no-undefined -version-info 6:6:6
 
 libproj_la_SOURCES = \
 	projects.h pj_list.h \
-	PJ_aeqd.c PJ_gnom.c PJ_laea.c PJ_mod_ster.c \
+	PJ_aeqd.c PJ_gnom.c PJ_laea.c PJ_isea.c PJ_mod_ster.c \
 	PJ_nsper.c PJ_nzmg.c PJ_ortho.c PJ_stere.c PJ_sterea.c \
 	PJ_aea.c PJ_bipc.c PJ_bonne.c PJ_eqdc.c \
 	PJ_imw_p.c PJ_krovak.c PJ_lcc.c PJ_poly.c \
diff --git a/src/Makefile.in b/src/Makefile.in
index 0f4d323..8bf2686 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -57,7 +57,7 @@ am__installdirs = "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)" \
 libLTLIBRARIES_INSTALL = $(INSTALL)
 LTLIBRARIES = $(lib_LTLIBRARIES)
 libproj_la_LIBADD =
-am_libproj_la_OBJECTS = PJ_aeqd.lo PJ_gnom.lo PJ_laea.lo \
+am_libproj_la_OBJECTS = PJ_aeqd.lo PJ_gnom.lo PJ_laea.lo PJ_isea.lo \
 	PJ_mod_ster.lo PJ_nsper.lo PJ_nzmg.lo PJ_ortho.lo PJ_stere.lo \
 	PJ_sterea.lo PJ_aea.lo PJ_bipc.lo PJ_bonne.lo PJ_eqdc.lo \
 	PJ_imw_p.lo PJ_krovak.lo PJ_lcc.lo PJ_poly.lo PJ_rpoly.lo \
@@ -259,7 +259,7 @@ lib_LTLIBRARIES = libproj.la
 libproj_la_LDFLAGS = -no-undefined -version-info 6:6:6
 libproj_la_SOURCES = \
 	projects.h pj_list.h \
-	PJ_aeqd.c PJ_gnom.c PJ_laea.c PJ_mod_ster.c \
+	PJ_aeqd.c PJ_gnom.c PJ_laea.c PJ_isea.c PJ_mod_ster.c \
 	PJ_nsper.c PJ_nzmg.c PJ_ortho.c PJ_stere.c PJ_sterea.c \
 	PJ_aea.c PJ_bipc.c PJ_bonne.c PJ_eqdc.c \
 	PJ_imw_p.c PJ_krovak.c PJ_lcc.c PJ_poly.c \
@@ -464,6 +464,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/PJ_krovak.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/PJ_labrd.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/PJ_laea.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/PJ_isea.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/PJ_lagrng.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/PJ_larr.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/PJ_lask.Plo@am__quote@
diff --git a/src/makefile.vc b/src/makefile.vc
index 54394d4..057a194 100644
--- a/src/makefile.vc
+++ b/src/makefile.vc
@@ -25,7 +25,8 @@ misc = \
 	PJ_chamb.obj PJ_hammer.obj PJ_lagrng.obj PJ_larr.obj \
 	PJ_lask.obj PJ_nocol.obj PJ_ob_tran.obj PJ_oea.obj \
 	PJ_tpeqd.obj PJ_vandg.obj PJ_vandg2.obj PJ_vandg4.obj \
-	PJ_wag7.obj pj_latlong.obj PJ_krovak.obj pj_geocent.obj
+	PJ_wag7.obj pj_latlong.obj PJ_krovak.obj pj_geocent.obj \
+	PJ_isea.obj
 
 pseudo = \
 	PJ_boggs.obj PJ_collg.obj PJ_crast.obj PJ_denoy.obj \
diff --git a/src/pj_list.h b/src/pj_list.h
index b965cc7..e421c3a 100644
--- a/src/pj_list.h
+++ b/src/pj_list.h
@@ -47,6 +47,7 @@ PROJ_HEAD(gs50, "Mod. Stererographics of 50 U.S.")
 PROJ_HEAD(hammer, "Hammer & Eckert-Greifendorff")
 PROJ_HEAD(hatano, "Hatano Asymmetrical Equal Area")
 PROJ_HEAD(imw_p, "Internation Map of the World Polyconic")
+PROJ_HEAD(isea, "Icosahedral Snyder Equal Area")
 PROJ_HEAD(kav5, "Kavraisky V")
 PROJ_HEAD(kav7, "Kavraisky VII")
 PROJ_HEAD(krovak, "Krovak")