diff --git a/src/evalfunc.c b/src/evalfunc.c
index f51aade..580f5d1 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -6473,7 +6473,7 @@
 			     || (minor == VIM_VERSION_MINOR
 				 && has_patch(atoi((char *)name + 10))))));
 	    }
-	    else
+	    else if (isdigit(name[5]))
 		n = has_patch(atoi((char *)name + 5));
 	}
 	else if (STRICMP(name, "vim_starting") == 0)
diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim
index ffac6df..f911cd9 100644
--- a/src/testdir/test_expr.vim
+++ b/src/testdir/test_expr.vim
@@ -41,6 +41,7 @@
   call assert_false(has('patch-7.4.'))
   call assert_false(has('patch-9.1.0'))
   call assert_false(has('patch-9.9.1'))
+  call assert_false(has('patch-abc'))
 endfunc
 
 func Test_op_ternary()
diff --git a/src/version.c b/src/version.c
index 87a8d10..ee421e4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    57,
+/**/
     56,
 /**/
     55,