diff --git a/configure b/configure
index 75d9f4e5..ea71fc40 100755
--- a/configure
+++ b/configure
@@ -2762,7 +2762,7 @@ fi
 	MODTARGET="modules"
 	appendLib -ldl
 	if test -n "$ISSUN"; then
-		appendCXX -mimpure-text
+		MODFLAGS="$MODFLAGS -mimpure-text"
 	fi
 fi
 
diff --git a/configure.in b/configure.in
index bc09f77e..05ae48af 100644
--- a/configure.in
+++ b/configure.in
@@ -58,7 +58,7 @@ if test "$MODULES" = "yes"; then
 	MODTARGET="modules"
 	appendLib -ldl
 	if test -n "$ISSUN"; then
-		appendCXX -mimpure-text
+		MODFLAGS="$MODFLAGS -mimpure-text"
 	fi
 fi