diff --git a/source/build/src/polymost.cpp b/source/build/src/polymost.cpp
index 84ab1e3ee..328f25ccb 100644
--- a/source/build/src/polymost.cpp
+++ b/source/build/src/polymost.cpp
@@ -1956,7 +1956,7 @@ static void polymost_drawpoly(vec2f_t const * const dpxy, int32_t const n, int32
         ngy.u -= ngy.d * uoffs;
         ngo.u -= ngo.d * uoffs;
 
-        float du0, du1;
+        float du0 = 0.f, du1 = 0.f;
 
         //Find min&max u coordinates (du0...du1)
         for (bssize_t i=0; i<npoints; ++i)
diff --git a/source/duke3d/src/astub.cpp b/source/duke3d/src/astub.cpp
index 4c2605649..5a386cef9 100644
--- a/source/duke3d/src/astub.cpp
+++ b/source/duke3d/src/astub.cpp
@@ -3836,7 +3836,7 @@ int64_t ldistsqr(spritetype *s1,spritetype *s2)
 static void TextEntryMode(int16_t startspr)
 {
     char ch, buffer[80], doingspace=0;
-    int16_t daang = 0, t, alphidx, basetile, linebegspr, curspr, cursor;
+    int16_t daang = 0, t, alphidx, linebegspr, curspr, cursor;
     int32_t i, j, k, dax = 0, day = 0;
     static uint8_t hgap=0, vgap=4;
     static uint8_t spcgap[MAX_ALPHABETS], firstrun=1;
@@ -3868,7 +3868,7 @@ static void TextEntryMode(int16_t startspr)
         return;
     }
 
-    t = sprite[startspr].picnum;
+    int16_t basetile = t = sprite[startspr].picnum;
     alphidx = -1;
     for (i=0; i<numalphabets; i++)
     {
diff --git a/source/duke3d/src/player.cpp b/source/duke3d/src/player.cpp
index 955eccf05..d7a6c12f3 100644
--- a/source/duke3d/src/player.cpp
+++ b/source/duke3d/src/player.cpp
@@ -858,7 +858,7 @@ static int A_ShootCustom(int const spriteNum, int const projecTile, int shootAng
     if (pProj->offset == 0)
         pProj->offset = 1;
 
-    int     otherSprite;
+    int     otherSprite = -1;
     int32_t zvel = 0;
 
     switch (pProj->workslike & PROJECTILE_TYPE_MASK)