diff --git a/configure.in b/configure.in
index 5b1f780260..bd9eec7425 100644
--- a/configure.in
+++ b/configure.in
@@ -149,6 +149,7 @@ if test "${enable_debug}" = "yes"; then
 
 	if test "x${ax_cv_c_compiler_vendor}" = "xgnu" ; then
 	    APR_ADDTO(SWITCH_AM_CFLAGS, -g -ggdb)
+	    export DEBUG_CFLAGS="-g -ggdb"
 	fi
 
 fi
diff --git a/libs/sofia-sip/configure.gnu b/libs/sofia-sip/configure.gnu
index 12fe773bd0..7bd9c100c5 100644
--- a/libs/sofia-sip/configure.gnu
+++ b/libs/sofia-sip/configure.gnu
@@ -1,3 +1,3 @@
 #! /bin/sh
-CFLAGS="$CFLAGS -DSU_DEBUG=0" ./configure "$@" --with-pic --with-glib=no --disable-shared
+CFLAGS="$CFLAGS -DSU_DEBUG=0 $DEBUG_CFLAGS" ./configure "$@" --with-pic --with-glib=no --disable-shared