diff --git a/lang/cem/cpp.ansi/LLlex.c b/lang/cem/cpp.ansi/LLlex.c
index 6c0b124f9..64108e1d7 100644
--- a/lang/cem/cpp.ansi/LLlex.c
+++ b/lang/cem/cpp.ansi/LLlex.c
@@ -252,7 +252,7 @@ garbage:
 			ptok->tk_val = (arith)0;
 			return ptok->tk_symb = INTEGER;
 		}
-		ptok->tk_str = Malloc(tg - buf);
+		ptok->tk_str = Malloc((unsigned)(tg - buf));
 		strcpy(ptok->tk_str, buf);
 		return IDENTIFIER;
 	}
diff --git a/lang/cem/cpp.ansi/domacro.c b/lang/cem/cpp.ansi/domacro.c
index 86d17b040..9e6aef839 100644
--- a/lang/cem/cpp.ansi/domacro.c
+++ b/lang/cem/cpp.ansi/domacro.c
@@ -719,7 +719,7 @@ get_text(formals, length)
 		blank = 0;
 	}
 	*length = repl->r_ptr - repl->r_text;
-	return Realloc(repl->r_text, repl->r_ptr - repl->r_text + 1);
+	return Realloc(repl->r_text, (unsigned)(repl->r_ptr - repl->r_text +1));
 }
 
 /*	macroeq() decides whether two macro replacement texts are
diff --git a/lang/cem/cpp.ansi/input.c b/lang/cem/cpp.ansi/input.c
index 62fad6336..a38d67f3c 100644
--- a/lang/cem/cpp.ansi/input.c
+++ b/lang/cem/cpp.ansi/input.c
@@ -30,7 +30,7 @@ getwdir(fn)
 		return "";
 	if (p) {
 		*p = '\0';
-		fn = Salloc(fn, p - &fn[0] + 1);
+		fn = Salloc(fn, (unsigned)(p - &fn[0] + 1));
 		*p = '/';
 		return fn;
 	}
diff --git a/lang/cem/cpp.ansi/preprocess.c b/lang/cem/cpp.ansi/preprocess.c
index 025af03e8..f80ec0014 100644
--- a/lang/cem/cpp.ansi/preprocess.c
+++ b/lang/cem/cpp.ansi/preprocess.c
@@ -186,7 +186,7 @@ preprocess(fn)
 			if (c & 0200)  {
 				if (c == EOI) {
 					newline();
-					flush(op-_obuf);
+					flush((int)(op-_obuf));
 					return;
 				}
 				fatal("non-ascii character read");
@@ -215,30 +215,29 @@ preprocess(fn)
 			case STCHAR:
 				{
 				register int stopc = c;
-				int escaped;
+				int escaped = 0;
 
 				do {
 
-					escaped = 0;
 					echo(c);
 					c = GetChar();
 					if (c == '\n') {
+					/* the compiler will complain */
 						break;
 					}
 					else if (c == EOI) {
 						newline();
-						flush(op-_obuf);
+						flush((int)(op-_obuf));
 						return;
 					}
-					if (c == '\\') {
+					if (!escaped && c == '\\') {
 						echo(c);
 						c = GetChar();
 						if (c == '\n') {
 							++LineNumber;
 							lineno++;
-						}
-						else if (c == '\'') escaped = 1;
-					}
+						} else escaped = 1;
+					} else escaped = 0;
 				} while (escaped || c != stopc);
 				echo(c);
 				if (c == '\n')
@@ -389,7 +388,7 @@ int *lineno;
 	for(;;) {
 		if (c == EOI) {
 			newline();
-			flush(op - _obuf);
+			flush((int)(op - _obuf));
 			op = 0;
 			break;
 		}
diff --git a/lang/cem/cpp.ansi/replace.c b/lang/cem/cpp.ansi/replace.c
index 487d86d15..7585d266b 100644
--- a/lang/cem/cpp.ansi/replace.c
+++ b/lang/cem/cpp.ansi/replace.c
@@ -45,7 +45,7 @@ replace(idf)
 	if (!expand_macro(repl, idf))
 		return 0;
 	InputLevel++;
-	InsertText(repl->r_text, repl->r_ptr - repl->r_text);
+	InsertText(repl->r_text, (int)(repl->r_ptr - repl->r_text));
 	idf->id_macro->mc_flag |= NOREPLACE;
 	repl->r_level = InputLevel;
 	repl->next = ReplaceList;