diff --git a/apps/openmw/mwdialogue/hypertextparser.cpp b/apps/openmw/mwdialogue/hypertextparser.cpp
index 28e450e2b2..fa7de97d2e 100644
--- a/apps/openmw/mwdialogue/hypertextparser.cpp
+++ b/apps/openmw/mwdialogue/hypertextparser.cpp
@@ -17,7 +17,7 @@ namespace MWDialogue
         std::vector<Token> parseHyperText(const std::string & text)
         {
             std::vector<Token> result;
-            size_t pos_end, iteration_pos = 0;
+            size_t pos_end = std::string::npos, iteration_pos = 0;
             for(;;)
             {
                 size_t pos_begin = text.find('@', iteration_pos);
diff --git a/apps/openmw/mwgui/dialogue.cpp b/apps/openmw/mwgui/dialogue.cpp
index ace051a025..1f155bd474 100644
--- a/apps/openmw/mwgui/dialogue.cpp
+++ b/apps/openmw/mwgui/dialogue.cpp
@@ -148,7 +148,7 @@ namespace MWGui
         // We need this copy for when @# hyperlinks are replaced
         std::string text = mText;
 
-        size_t pos_end;
+        size_t pos_end = std::string::npos;
         for(;;)
         {
             size_t pos_begin = text.find('@');
diff --git a/apps/openmw/mwgui/journalviewmodel.cpp b/apps/openmw/mwgui/journalviewmodel.cpp
index 426c3b4378..6b38cd0d9d 100644
--- a/apps/openmw/mwgui/journalviewmodel.cpp
+++ b/apps/openmw/mwgui/journalviewmodel.cpp
@@ -129,7 +129,7 @@ struct JournalViewModelImpl : JournalViewModel
 
                         utf8text.replace(pos_begin, pos_end+1-pos_begin, displayName);
 
-                        intptr_t value;
+                        intptr_t value = 0;
                         if (mModel->mKeywordSearch.containsKeyword(topicName, value))
                             mHyperLinks[std::make_pair(pos_begin, pos_begin+displayName.size())] = value;
                     }
diff --git a/apps/openmw/mwphysics/stepper.cpp b/apps/openmw/mwphysics/stepper.cpp
index 2a28381bee..6c7e5223f3 100644
--- a/apps/openmw/mwphysics/stepper.cpp
+++ b/apps/openmw/mwphysics/stepper.cpp
@@ -60,7 +60,7 @@ namespace MWPhysics
         // attempt 3: further, less tall fixed distance movement, same as above
         // If you're making a full conversion you should purge the logic for attempts 2 and 3. Attempts 2 and 3 just try to work around problems with vanilla Morrowind assets.
         int attempt = 0;
-        float downStepSize;
+        float downStepSize = 0;
         while(attempt < 3)
         {
             attempt++;