diff --git a/channels/h323/Makefile b/channels/h323/Makefile
index 204cb5165af9f9aecf7d4aaed97544a169f1d532..f5203907c9609869c78802febaa3a795e5cf0325 100755
--- a/channels/h323/Makefile
+++ b/channels/h323/Makefile
@@ -16,6 +16,16 @@ ifndef ASTETCDIR
 ASTETCDIR=/etc/asterisk
 endif
 
+PWLIB_MAJOR_VERSION=$(shell cat ${PWLIBDIR}/version.h | grep MAJOR_VERSION | cut -f3 -d' ')
+PWLIB_MINOR_VERSION=$(shell cat ${PWLIBDIR}/version.h | grep MINOR_VERSION | cut -f3 -d' ')
+PWLIB_BUILD_NUMBER=$(shell cat ${PWLIBDIR}/version.h | grep BUILD_NUMBER | cut -f3 -d' ')
+PWLIB_VERSION="${PWLIB_MAJOR_VERSION}.${PWLIB_MINOR_VERSION}.${PWLIB_BUILD_NUMBER}"
+
+OPENH323_MAJOR_VERSION=$(shell cat ${OPENH323DIR}/version.h | grep MAJOR_VERSION | cut -f3 -d' ')
+OPENH323_MINOR_VERSION=$(shell cat ${OPENH323DIR}/version.h | grep MINOR_VERSION | cut -f3 -d' ')
+OPENH323_BUILD_NUMBER=$(shell cat ${OPENH323DIR}/version.h | grep BUILD_NUMBER | cut -f3 -d' ')
+OPENH323_VERSION="${OPENH323_MAJOR_VERSION}.${OPENH323_MINOR_VERSION}.${OPENH323_BUILD_NUMBER}"
+
 #
 # This needs to be updated to deal with more than just little endian machines
 #
@@ -46,7 +56,7 @@ CFLAGS += -I../../include
 CFLAGS += -I$(PWLIBDIR)/include 
 CFLAGS += -I$(OPENH323DIR)/include -Wno-missing-prototypes
 
-all:	depend libchanh323.a
+all:	checkversion depend libchanh323.a
 
 samples: 
 	if [ -f $(ASTETCDIR)/h323.conf ]; then \
@@ -82,4 +92,24 @@ depend: .depend
 .depend:
 	../../mkdep $(CFLAGS) `ls *.cpp`
 
-
+checkversion:
+	@echo -n "PWLib version is ${PWLIB_VERSION}... "
+	@if [ ${PWLIB_VERSION} == "1.8.1" ]; then \
+		echo "ok" ; \
+	else \
+		echo "BAD" ; \
+		echo ; \
+		echo "Please read README for further details!" ; \
+		echo ; \
+		exit 1 ; \
+	fi
+	@echo -n "OpenH323 version is ${OPENH323_VERSION}... "
+	@if [ ${OPENH323_VERSION} == "1.15.1" ]; then \
+		echo "ok" ; \
+	else \
+		echo "BAD" ; \
+		echo ; \
+		echo "Please read README for further details!" ; \
+		echo ; \
+		exit 1 ; \
+	fi
diff --git a/channels/h323/README b/channels/h323/README
index b85fc5f6fabfe8f69e52c1b525f868ce28523f01..475a2ccb362085847571eb5304f3256cc0155150 100755
--- a/channels/h323/README
+++ b/channels/h323/README
@@ -9,13 +9,11 @@
 	       			expat-1.95+
 	       			expat-dev-1.95+
 
-This code was recently updated to deal with Open H.323 v1.14.4 and PWLib
-v1.7.5. Not much testing has been done, please test and report your findings.
-
+You must run Open H.323 v1.15.1 and PWLib v1.8.1. All other versions are not supported.
 You can find the Open H.323 source here: http://www.sf.net/projects/openh323/
 
 NOTICE: Whatever you do, DO NOT USE distrubution specific installs
-of Open H.323 and PWLib. In fact you should check to make sure 
+of Open H.323 and PWLib. In fact, you should check to make sure 
 your distro did not install them for you without your knowledge.