diff --git a/gcc/testsuite/lib/scanasm.exp b/gcc/testsuite/lib/scanasm.exp
index 6cf9997240deec274a191103d21690d80e34ba95..42c719c512c75e7227084c93838af5897544f8b3 100644
--- a/gcc/testsuite/lib/scanasm.exp
+++ b/gcc/testsuite/lib/scanasm.exp
@@ -869,15 +869,15 @@ proc configure_check-function-bodies { config } {
     # Regexp for the start of a function definition (name in \1).
     if { [istarget nvptx*-*-*] } {
 	set up_config(start) {
-	    {^// BEGIN(?: GLOBAL|) FUNCTION DEF: ([a-zA-Z_]\S+)$}
+	    {^// BEGIN(?: GLOBAL|) FUNCTION DEF: ([a-zA-Z_]\S*)$}
 	}
     } elseif { [istarget *-*-darwin*] } {
 	set up_config(start) {
-	    {^_([a-zA-Z_]\S+):$}
+	    {^_([a-zA-Z_]\S*):$}
 	    {^LFB[0-9]+:}
 	}
     } else {
-	set up_config(start) {{^([a-zA-Z_]\S+):$}}
+	set up_config(start) {{^([a-zA-Z_]\S*):$}}
     }
 
     # Regexp for the end of a function definition.