diff --git a/src/dobjtype.cpp b/src/dobjtype.cpp
index 32df6a537..5798648cd 100644
--- a/src/dobjtype.cpp
+++ b/src/dobjtype.cpp
@@ -357,8 +357,8 @@ unsigned int PClass::Extend(unsigned int extension)
 }
 
 // Like FindClass but creates a placeholder if no class
-// is found. CreateDerivedClass will automatcally fill in
-// the placeholder when the actual class is defined.
+// is found. CreateDerivedClass will automatically fill
+// in the placeholder when the actual class is defined.
 const PClass *PClass::FindClassTentative (FName name)
 {
 	if (name == NAME_None)
diff --git a/src/r_defs.h b/src/r_defs.h
index 87c9e9e4f..02eefcf91 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -904,7 +904,7 @@ struct line_t
 	slopetype_t	slopetype;	// To aid move clipping.
 	sector_t	*frontsector, *backsector;
 	int 		validcount;	// if == validcount, already checked
-	int		locknumber;	// [Dusk] lock number for special
+	int			locknumber;	// [Dusk] lock number for special
 };
 
 // phares 3/14/98
diff --git a/src/v_video.cpp b/src/v_video.cpp
index e6145cc95..e3a832dde 100644
--- a/src/v_video.cpp
+++ b/src/v_video.cpp
@@ -491,7 +491,7 @@ int V_GetColorFromString (const DWORD *palette, const char *cstr)
 		else
 		{
 normal:
-			// Treat it as a space-delemited hexadecimal string
+			// Treat it as a space-delimited hexadecimal string
 			for (i = 0; i < 3; ++i)
 			{
 				// Skip leading whitespace