diff --git a/mkspecs/features/common_pre.prf b/mkspecs/features/common_pre.prf
index 9eb441d0c..75a62dc80 100644
--- a/mkspecs/features/common_pre.prf
+++ b/mkspecs/features/common_pre.prf
@@ -176,7 +176,7 @@ isEmpty(PREFIX) {
 # Debug Suffix
 ################################
 
-win32: CONFIG(debug, debug|release): DLL_DEBUG_SUFFIX = d
+msvc: CONFIG(debug, debug|release): DLL_DEBUG_SUFFIX = d
 
 ################################
 # Inter-project dependencies
diff --git a/src/blackgui/blackgui.pro b/src/blackgui/blackgui.pro
index f723530ce..43ee47b90 100644
--- a/src/blackgui/blackgui.pro
+++ b/src/blackgui/blackgui.pro
@@ -68,8 +68,12 @@ win32 {
 }
 
 win32 {
-    CONFIG(debug, debug|release): LIBS *= -lqwtd
-    CONFIG(release, debug|release): LIBS *= -lqwt
+    msvc {
+        CONFIG(debug, debug|release): LIBS *= -lqwtd
+        CONFIG(release, debug|release): LIBS *= -lqwt
+    } else {
+        LIBS *= -lqwt
+    }
 }
 else:macx {
     macx: LIBS *= -framework qwt