diff --git a/libguile/Makefile.am b/libguile/Makefile.am
index 62498652b..c780e0f83 100644
--- a/libguile/Makefile.am
+++ b/libguile/Makefile.am
@@ -59,7 +59,7 @@ noinst_HEADERS = coop-threads.c coop-threads.h coop.c
 
 libguile_la_DEPENDENCIES = @LIBLOBJS@
 libguile_la_LIBADD = @LIBLOBJS@
-libguile_la_LDFLAGS = -version-info 3:0 -export-dynamic
+libguile_la_LDFLAGS = -version-info 4:0 -export-dynamic
 
 include_HEADERS = libguile.h
 
diff --git a/libguile/Makefile.in b/libguile/Makefile.in
index 12ec56974..919e98b80 100644
--- a/libguile/Makefile.in
+++ b/libguile/Makefile.in
@@ -139,7 +139,7 @@ noinst_HEADERS = coop-threads.c coop-threads.h coop.c
 
 libguile_la_DEPENDENCIES = @LIBLOBJS@
 libguile_la_LIBADD = @LIBLOBJS@
-libguile_la_LDFLAGS = -version-info 3:0 -export-dynamic
+libguile_la_LDFLAGS = -version-info 4:0 -export-dynamic
 
 include_HEADERS = libguile.h