diff --git a/src/g_heretic/a_hereticmisc.cpp b/src/g_heretic/a_hereticmisc.cpp
index 83200068b..279635482 100644
--- a/src/g_heretic/a_hereticmisc.cpp
+++ b/src/g_heretic/a_hereticmisc.cpp
@@ -187,7 +187,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_VolcanoBlast)
 
 DEFINE_ACTION_FUNCTION(AActor, A_VolcBallImpact)
 {
-	int i;
+	unsigned int i;
 	AActor *tiny;
 	angle_t angle;
 
diff --git a/src/g_heretic/a_hereticweaps.cpp b/src/g_heretic/a_hereticweaps.cpp
index 23ecf1ae5..17c9621d5 100644
--- a/src/g_heretic/a_hereticweaps.cpp
+++ b/src/g_heretic/a_hereticweaps.cpp
@@ -797,7 +797,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FireBlasterPL1)
 
 DEFINE_ACTION_FUNCTION(AActor, A_SpawnRippers)
 {
-	int i;
+	unsigned int i;
 	angle_t angle;
 	AActor *ripper;
 
diff --git a/src/g_heretic/a_ironlich.cpp b/src/g_heretic/a_ironlich.cpp
index 5801e6cac..d8c1fd285 100644
--- a/src/g_heretic/a_ironlich.cpp
+++ b/src/g_heretic/a_ironlich.cpp
@@ -171,7 +171,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_WhirlwindSeek)
 
 DEFINE_ACTION_FUNCTION(AActor, A_LichIceImpact)
 {
-	int i;
+	unsigned int i;
 	angle_t angle;
 	AActor *shard;
 
diff --git a/src/g_hexen/a_iceguy.cpp b/src/g_hexen/a_iceguy.cpp
index 2d908f974..9d8360d4d 100644
--- a/src/g_hexen/a_iceguy.cpp
+++ b/src/g_hexen/a_iceguy.cpp
@@ -125,7 +125,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_IceGuyDie)
 DEFINE_ACTION_FUNCTION(AActor, A_IceGuyMissileExplode)
 {
 	AActor *mo;
-	int i;
+	unsigned int i;
 
 	for (i = 0; i < 8; i++)
 	{