diff --git a/libsodium/configure b/libsodium/configure
index 12ae049e..44e3e399 100755
--- a/libsodium/configure
+++ b/libsodium/configure
@@ -5430,7 +5430,7 @@ if test "x$enable_ssp" != "xno"; then :
 
 
 case $host_os in #(
-  cygwin*|mingw*|msys|pw32*|cegcc*) :
+  cygwin*|mingw*|msys|pw32*|cegcc*|*aix*|*sunos*|*solaris*) :
       ;; #(
   *) :
 
diff --git a/libsodium/configure.ac b/libsodium/configure.ac
index b1c75231..ce11face 100644
--- a/libsodium/configure.ac
+++ b/libsodium/configure.ac
@@ -188,7 +188,7 @@ AS_CASE([$host_os],
 AS_IF([test "x$enable_ssp" != "xno"],[
 
 AS_CASE([$host_os],
-  [cygwin*|mingw*|msys|pw32*|cegcc*], [ ],
+  [cygwin*|mingw*|msys|pw32*|cegcc*|*aix*|*sunos*|*solaris*], [ ],
   [*], [
     AX_CHECK_COMPILE_FLAG([-fstack-protector], [
       AX_CHECK_LINK_FLAG([-fstack-protector],