diff --git a/src/configure b/src/configure
index c450b00c7668fc5701472dbaaeaae861faf5cce9..3656ee4b0e1a5e2f8fce46e55500195b6af775f9 100755
--- a/src/configure
+++ b/src/configure
@@ -641,7 +641,7 @@ starts 'checking host system type...'
 **************************************************************
 EOT
 	TEMPLATE=generic
-	GUESS=`grep $host_os template/.similar 2>/dev/null`
+	GUESS=`grep "$host_os=" template/.similar 2>/dev/null`
 	if test $GUESS
 	then
 		TEMPLATE=`echo $GUESS | sed 's/.*=//'`
diff --git a/src/configure.in b/src/configure.in
index 664c0f6a87b2e550444515ec0687bda1f0a10af4..eb2c8b184fddaf8770571efc897ad33e43fb94aa 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -79,7 +79,7 @@ starts 'checking host system type...'
 **************************************************************
 EOT
 	TEMPLATE=generic
-	GUESS=`grep $host_os template/.similar 2>/dev/null`
+	GUESS=`grep "$host_os=" template/.similar 2>/dev/null`
 	if test $GUESS
 	then
 		TEMPLATE=`echo $GUESS | sed 's/.*=//'`