diff --git a/ueforth/Makefile b/ueforth/Makefile
index cad5659..cf92cd8 100644
--- a/ueforth/Makefile
+++ b/ueforth/Makefile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-VERSION=7.0.6.15
+VERSION=7.0.6.16
 STABLE_VERSION=7.0.5.4
 REVISION=$(shell git rev-parse HEAD | head -c 20)
 REVSHORT=$(shell echo $(REVISION) | head -c 7)
diff --git a/ueforth/common/floats.h b/ueforth/common/floats.h
index 5b2cdfd..db2a8ec 100644
--- a/ueforth/common/floats.h
+++ b/ueforth/common/floats.h
@@ -45,7 +45,7 @@
   Y(SFLOAT, DUP; tos = sizeof(float)) \
   Y(SFLOATS, tos *= sizeof(float)) \
   X("SFLOAT+", SFLOATPLUS, DUP; tos += sizeof(float)) \
-  Y(PI, *++fp = 3.14159265359f) \
+  X("PI", PI_CONST, *++fp = 3.14159265359f) \
   Y(FSIN, *fp = sin(*fp)) \
   Y(FCOS, *fp = cos(*fp)) \
   Y(FSINCOS, fp[1] = cos(*fp); *fp = sin(*fp); ++fp) \
diff --git a/ueforth/esp32/builtins.h b/ueforth/esp32/builtins.h
index 20b17b1..b92d7bd 100644
--- a/ueforth/esp32/builtins.h
+++ b/ueforth/esp32/builtins.h
@@ -383,7 +383,7 @@ static cell_t TimerIsrRegister(cell_t group, cell_t timer, cell_t xt, cell_t arg
   YV(sockets, sockaccept, n0 = accept(n2, (struct sockaddr *) a1, (socklen_t *) a0); NIPn(2)) \
   YV(sockets, select, n0 = select(n4, (fd_set *) a3, (fd_set *) a2, (fd_set *) a1, (struct timeval *) a0); NIPn(4)) \
   YV(sockets, poll, n0 = poll((struct pollfd *) a2, (nfds_t) n1, n0); NIPn(2)) \
-  YV(sockets, errno, PUSH errno)
+  XV(sockets, "errno", ERRNO, PUSH errno)
 #endif
 
 #ifndef ENABLE_SD_SUPPORT