diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index 92103f1e3..41f4cc5f2 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -75,12 +75,12 @@ contains(FIRST_CLASS_MESSAGING, 1) {
 #  or: qmake "USE_IPV6=0" (disabled by default)
 #  or: qmake "USE_IPV6=-" (not supported)
 contains(USE_IPV6, -) {
-	message(Building without IPv6 support)
+    message(Building without IPv6 support)
 } else {
-	count(USE_IPV6, 0) {
-		USE_IPV6=1
-	}
-	DEFINES += USE_IPV6=$$USE_IPV6
+    count(USE_IPV6, 0) {
+        USE_IPV6=1
+    }
+    DEFINES += USE_IPV6=$$USE_IPV6
 }
 
 contains(BITCOIN_NEED_QT_PLUGINS, 1) {