diff --git a/racket/src/configure b/racket/src/configure
index 64d3436fc5..cc41f20eef 100755
--- a/racket/src/configure
+++ b/racket/src/configure
@@ -4537,7 +4537,7 @@ case "$host_os" in
     LIBS="$LIBS -lsocket -lnsl -lintl"
     need_gcc_static_libgcc="yes"
     check_gcc_dash_e="yes"
-    try_poll_syscall="yes"
+    try_poll_syscall="no" # poll() has performance problems on Solaris?
     use_flag_pthread="no"
     use_flag_posix_pthread="yes"
     ;;
diff --git a/racket/src/racket/configure.ac b/racket/src/racket/configure.ac
index dc5faf3bd0..dc9a3b5ae8 100644
--- a/racket/src/racket/configure.ac
+++ b/racket/src/racket/configure.ac
@@ -668,7 +668,7 @@ case "$host_os" in
     LIBS="$LIBS -lsocket -lnsl -lintl"
     need_gcc_static_libgcc="yes"
     check_gcc_dash_e="yes"
-    try_poll_syscall="yes"
+    try_poll_syscall="no" # poll() has performance problems on Solaris?
     use_flag_pthread="no"
     use_flag_posix_pthread="yes"
     ;;