diff -up qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/jsruntime.pri.no_sse2 qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/jsruntime.pri
--- qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/jsruntime.pri.no_sse2	2015-06-29 15:12:38.000000000 -0500
+++ qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/jsruntime.pri	2015-07-16 08:49:00.280760307 -0500
@@ -111,6 +111,11 @@ SOURCES += \
     $$PWD/qv4string.cpp \
     $$PWD/qv4value.cpp
 
+linux-g++*:isEqual(QT_ARCH,i386):!no_sse2 {
+    QMAKE_CFLAGS += -msse2 -mfpmath=sse
+    QMAKE_CXXFLAGS += -msse2 -mfpmath=sse
+}
+
 valgrind {
     DEFINES += V4_USE_VALGRIND
 }
diff -up qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4global_p.h.no_sse2 qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4global_p.h
--- qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4global_p.h.no_sse2	2015-06-29 15:12:38.000000000 -0500
+++ qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4global_p.h	2015-07-16 08:49:00.280760307 -0500
@@ -74,7 +74,7 @@ inline double trunc(double d) { return d
 //
 // NOTE: This should match the logic in qv4targetplatform_p.h!
 
-#if defined(Q_PROCESSOR_X86) && !defined(__ILP32__) \
+#if defined(Q_PROCESSOR_X86) && !defined(__ILP32__) && defined(__SSE2__) \
     && (defined(Q_OS_WIN) || defined(Q_OS_LINUX) || defined(Q_OS_QNX) || defined(Q_OS_FREEBSD))
 #define V4_ENABLE_JIT
 #elif defined(Q_PROCESSOR_X86_64) && !defined(__ILP32__) \
diff -up qtdeclarative-opensource-src-5.5.0/src/qml/qml/v8/qv8engine.cpp.no_sse2 qtdeclarative-opensource-src-5.5.0/src/qml/qml/v8/qv8engine.cpp
--- qtdeclarative-opensource-src-5.5.0/src/qml/qml/v8/qv8engine.cpp.no_sse2	2015-06-29 15:12:39.000000000 -0500
+++ qtdeclarative-opensource-src-5.5.0/src/qml/qml/v8/qv8engine.cpp	2015-07-16 08:49:00.280760307 -0500
@@ -123,7 +123,7 @@ QV8Engine::QV8Engine(QJSEngine* qq)
     , m_xmlHttpRequestData(0)
     , m_listModelData(0)
 {
-#ifdef Q_PROCESSOR_X86_32
+#if defined(Q_PROCESSOR_X86_32) && defined(__SSE2__)
     if (!qCpuHasFeature(SSE2)) {
         qFatal("This program requires an X86 processor that supports SSE2 extension, at least a Pentium 4 or newer");
     }