diff --git a/meta/classes/qt4e.bbclass b/meta/classes/qt4e.bbclass
index de2a68d25b..d7f5df842a 100644
--- a/meta/classes/qt4e.bbclass
+++ b/meta/classes/qt4e.bbclass
@@ -18,3 +18,6 @@ EXTRA_QMAKEVARS_PRE += " QT_LIBINFIX=${QT_LIBINFIX} "
 
 # Qt4 uses atomic instructions not supported in thumb mode
 ARM_INSTRUCTION_SET = "arm"
+
+# Qt4 could NOT be built on MIPS64 with 64 bits userspace
+COMPATIBLE_HOST_mips64 = "mips64.*-linux-gnun32"
diff --git a/meta/classes/qt4x11.bbclass b/meta/classes/qt4x11.bbclass
index b06e15d29e..65d196afc6 100644
--- a/meta/classes/qt4x11.bbclass
+++ b/meta/classes/qt4x11.bbclass
@@ -9,3 +9,6 @@ QT_LIBINFIX = ""
 
 # Qt4 uses atomic instructions not supported in thumb mode
 ARM_INSTRUCTION_SET = "arm"
+
+# Qt4 could NOT be built on MIPS64 with 64 bits userspace
+COMPATIBLE_HOST_mips64 = "mips64.*-linux-gnun32"