diff --git a/historic/jam/src/build.sh b/historic/jam/src/build.sh
index e7f932726..222e9b0a9 100644
--- a/historic/jam/src/build.sh
+++ b/historic/jam/src/build.sh
@@ -135,7 +135,7 @@ case $BOOST_JAM_TOOLSET in
     ;;
     
     acc)
-    BOOST_JAM_CC=cc -Ae
+    BOOST_JAM_CC="cc -Ae"
     ;;
     
     cc)
diff --git a/jam_src/build.sh b/jam_src/build.sh
index e7f932726..222e9b0a9 100644
--- a/jam_src/build.sh
+++ b/jam_src/build.sh
@@ -135,7 +135,7 @@ case $BOOST_JAM_TOOLSET in
     ;;
     
     acc)
-    BOOST_JAM_CC=cc -Ae
+    BOOST_JAM_CC="cc -Ae"
     ;;
     
     cc)