diff --git a/doomsday/config_unix_any.pri b/doomsday/config_unix_any.pri
index 4e90f6002b..e416100e1e 100644
--- a/doomsday/config_unix_any.pri
+++ b/doomsday/config_unix_any.pri
@@ -11,6 +11,10 @@ QMAKE_CFLAGS_WARN_ON -= -Wall
 QMAKE_CFLAGS_WARN_ON -= -W
 QMAKE_CFLAGS_WARN_ON += -Werror-implicit-function-declaration -fdiagnostics-show-option
 
+*-clang* {
+    QMAKE_CFLAGS_WARN_ON += -Wno-tautological-compare
+}
+
 # Print include directories and other info.
 #QMAKE_CFLAGS += -Wp,-v
 
diff --git a/doomsday/engine/portable/src/gl_texmanager.c b/doomsday/engine/portable/src/gl_texmanager.c
index 5c0f9d1eb0..523a24e4ed 100644
--- a/doomsday/engine/portable/src/gl_texmanager.c
+++ b/doomsday/engine/portable/src/gl_texmanager.c
@@ -3107,8 +3107,8 @@ static void performImageAnalyses(Texture* tex, const image_t* image,
 
     // Average alpha?
     if(spec->type == TST_GENERAL &&
-       (TS_GENERAL(spec)->context == TC_SPRITE_DIFFUSE) ||
-       (TS_GENERAL(spec)->context == TC_UI))
+       (TS_GENERAL(spec)->context == TC_SPRITE_DIFFUSE ||
+        TS_GENERAL(spec)->context == TC_UI))
     {
         averagealpha_analysis_t* aa = (averagealpha_analysis_t*) Texture_Analysis(tex, TA_ALPHA);
         boolean firstInit = (!aa);
diff --git a/doomsday/engine/portable/src/materialvariant.c b/doomsday/engine/portable/src/materialvariant.c
index 0c7c3efea5..b2f3e9620f 100644
--- a/doomsday/engine/portable/src/materialvariant.c
+++ b/doomsday/engine/portable/src/materialvariant.c
@@ -240,7 +240,7 @@ int MaterialVariant_SnapshotPrepareFrame(const materialvariant_t* mat)
 void MaterialVariant_SetSnapshotPrepareFrame(materialvariant_t* mat, int frame)
 {
     assert(mat);
-    mat->_snapshotPrepareFrame;
+    mat->_snapshotPrepareFrame = frame;
 }
 
 materialvariant_t* MaterialVariant_TranslationNext(materialvariant_t* mat)
diff --git a/doomsday/engine/portable/src/p_maputil.c b/doomsday/engine/portable/src/p_maputil.c
index 71b2cdf028..6337a62486 100644
--- a/doomsday/engine/portable/src/p_maputil.c
+++ b/doomsday/engine/portable/src/p_maputil.c
@@ -480,7 +480,7 @@ int GameMap_LineMobjsIterator(GameMap* map, LineDef* lineDef,
     int result = false;
     assert(map);
 
-    root = map->lineLinks[GameMap_LineDefIndex(map, lineDef)], nix;
+    root = map->lineLinks[GameMap_LineDefIndex(map, lineDef)];
     ln = map->lineNodes.nodes;
 
     for(nix = ln[root].next; nix != root; nix = ln[nix].next)
diff --git a/doomsday/engine/portable/src/point.c b/doomsday/engine/portable/src/point.c
index a83ab27e91..7935f170e3 100644
--- a/doomsday/engine/portable/src/point.c
+++ b/doomsday/engine/portable/src/point.c
@@ -149,7 +149,7 @@ void Point2_Sum(Point2* p, const Point2* other)
 boolean Point2_Equality(const Point2* p, const Point2* other)
 {
     assert(p && other);
-    return p == other || p->raw.x == Point2_X(other) && p->raw.y == Point2_Y(other);
+    return p == other || (p->raw.x == Point2_X(other) && p->raw.y == Point2_Y(other));
 }
 
 Point2f* Point2f_New(void)
@@ -265,7 +265,7 @@ void Point2f_Sum(Point2f* p, const Point2f* other)
 boolean Point2f_Equality(const Point2f* p, const Point2f* other)
 {
     assert(p && other);
-    return p == other || p->raw.x == Point2f_X(other) && p->raw.y == Point2f_Y(other);
+    return p == other || (p->raw.x == Point2f_X(other) && p->raw.y == Point2f_Y(other));
 }
 
 struct point3_s {
@@ -404,7 +404,9 @@ void Point3_Sum(Point3* p, const Point3* other)
 boolean Point3_Equality(const Point3* p, const Point3* other)
 {
     assert(p && other);
-    return p == other || p->raw.x == Point3_X(other) && p->raw.y == Point3_Y(other) && p->raw.z == Point3_Z(other);
+    return p == other || (p->raw.x == Point3_X(other) &&
+                          p->raw.y == Point3_Y(other) &&
+                          p->raw.z == Point3_Z(other));
 }
 
 Point3f* Point3f_New(void)
@@ -533,5 +535,7 @@ void Point3f_Sum(Point3f* p, const Point3f* other)
 boolean Point3f_Equality(const Point3f* p, const Point3f* other)
 {
     assert(p && other);
-    return p == other || p->raw.x == Point3f_X(other) && p->raw.y == Point3f_Y(other) && p->raw.z == Point3f_Z(other);
+    return p == other || (p->raw.x == Point3f_X(other) &&
+                          p->raw.y == Point3f_Y(other) &&
+                          p->raw.z == Point3f_Z(other));
 }
diff --git a/doomsday/engine/portable/src/r_lgrid.c b/doomsday/engine/portable/src/r_lgrid.c
index 87618f52a2..2f2cb8d387 100644
--- a/doomsday/engine/portable/src/r_lgrid.c
+++ b/doomsday/engine/portable/src/r_lgrid.c
@@ -599,7 +599,7 @@ static void LG_ApplySector(gridblock_t *block, const float *color, float level,
 void LG_SectorChanged(Sector* sector)
 {
     if(!lgInited) return;
-    if(!sector || 0 == sector->changedBlockCount && 0 == sector->blockCount) return;
+    if(!sector || (!sector->changedBlockCount && !sector->blockCount)) return;
 
     // Mark changed blocks and contributors.
     { uint i;
diff --git a/doomsday/engine/portable/src/sys_reslocator.c b/doomsday/engine/portable/src/sys_reslocator.c
index 2e07d2b9ec..c33fef1c6a 100644
--- a/doomsday/engine/portable/src/sys_reslocator.c
+++ b/doomsday/engine/portable/src/sys_reslocator.c
@@ -338,7 +338,7 @@ static boolean findResourceInNamespace(resourcenamespaceinfo_t* rnInfo, const dd
         p.foundNode = NULL;
 
         // Perform the search.
-        if(found = ResourceNamespace_Iterate2(rnInfo->rnamespace, name, findResourceInNamespaceWorker, (void*)&p))
+        if((found = ResourceNamespace_Iterate2(rnInfo->rnamespace, name, findResourceInNamespaceWorker, (void*)&p)))
         {
             // Does the caller want to know the matched path?
             if(foundPath)