diff --git a/lib/linguist/heuristics.rb b/lib/linguist/heuristics.rb
index 3ed7904d..b887c201 100644
--- a/lib/linguist/heuristics.rb
+++ b/lib/linguist/heuristics.rb
@@ -107,10 +107,14 @@ module Linguist
       end
     end
 
-    disambiguate "IDL", "Prolog" do |data|
+    disambiguate "IDL", "Prolog", "INI", "QMake" do |data|
       if data.include?(":-")
         Language["Prolog"]
-      else
+      elsif data.include?("last_client=")
+        Language["INI"]
+      elsif data.include?("HEADERS") && data.include?("SOURCES")
+        Language["QMake"]
+      elsif /^\s*function[ \w,]+$/.match(data)
         Language["IDL"]
       end
     end
diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 71d101eb..9ee8262c 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1335,6 +1335,7 @@ INI:
   - .ini
   - .cfg
   - .prefs
+  - .pro
   - .properties
   tm_scope: source.ini
   aliases:
diff --git a/samples/INI/MouseKeyboard.pro b/samples/INI/MouseKeyboard.pro
new file mode 100644
index 00000000..0bc4ff8f
--- /dev/null
+++ b/samples/INI/MouseKeyboard.pro
@@ -0,0 +1,71 @@
+update=Sun 15 Feb 2015 01:10:10 PM EST
+last_client=eeschema
+[pcbnew]
+version=1
+PageLayoutDescrFile=
+LastNetListRead=
+UseCmpFile=1
+PadDrill=0.6
+PadDrillOvalY=0.6
+PadSizeH=1.5
+PadSizeV=1.5
+PcbTextSizeV=1.5
+PcbTextSizeH=1.5
+PcbTextThickness=0.3
+ModuleTextSizeV=1
+ModuleTextSizeH=1
+ModuleTextSizeThickness=0.15
+SolderMaskClearance=0
+SolderMaskMinWidth=0
+DrawSegmentWidth=0.2
+BoardOutlineThickness=0.09999999999999999
+ModuleOutlineThickness=0.15
+[pcbnew/libraries]
+LibDir=
+[general]
+version=1
+[eeschema]
+version=1
+PageLayoutDescrFile=
+SubpartIdSeparator=0
+SubpartFirstId=65
+LibDir=/home/hschmale/KiCad/LibMods-3rdParty
+NetFmtName=
+RptD_X=0
+RptD_Y=100
+RptLab=1
+LabSize=60
+[eeschema/libraries]
+LibName1=power
+LibName2=device
+LibName3=transistors
+LibName4=conn
+LibName5=linear
+LibName6=regul
+LibName7=74xx
+LibName8=cmos4000
+LibName9=adc-dac
+LibName10=memory
+LibName11=xilinx
+LibName12=special
+LibName13=microcontrollers
+LibName14=dsp
+LibName15=microchip
+LibName16=analog_switches
+LibName17=motorola
+LibName18=texas
+LibName19=intel
+LibName20=audio
+LibName21=interface
+LibName22=digital-audio
+LibName23=philips
+LibName24=display
+LibName25=cypress
+LibName26=siliconi
+LibName27=opto
+LibName28=atmel
+LibName29=contrib
+LibName30=valves
+LibName31=arduino_shieldsNCL
+LibName32=con-usb-2
+LibName33=2axispotwselect
diff --git a/test/test_heuristics.rb b/test/test_heuristics.rb
index cadb35f6..dcdf3328 100644
--- a/test/test_heuristics.rb
+++ b/test/test_heuristics.rb
@@ -60,11 +60,13 @@ class TestHeuristcs < Minitest::Test
     })
   end
 
-  # Candidate languages = ["IDL", "Prolog"]
-  def test_pro_prolog_idl_by_heuristics
+  # Candidate languages = ["IDL", "Prolog", "QMake", "INI"]
+  def test_pro_by_heuristics
     assert_heuristics({
-      "Prolog" => "Prolog/logic-problem.pro",
-      "IDL" => "IDL/mg_acosh.pro"
+      "Prolog" => all_fixtures("Prolog", "*.pro"),
+      "IDL" => all_fixtures("IDL", "*.pro"),
+      "INI" => all_fixtures("INI", "*.pro"),
+      "QMake" => all_fixtures("QMake", "*.pro")
     })
   end