diff --git a/asm.cpp b/asm.cpp
index 1045272..6dc0de5 100644
--- a/asm.cpp
+++ b/asm.cpp
@@ -343,7 +343,7 @@ std::string commentEx = "^(\\s*)((;|\\/{2}))+(.*)";
 void CLASS::set(std::string line)
 {
 	int state = 0;
-	int l = line.length();
+	int l = (int)line.length();
 	int i = 0;
 	int x;
 	char c, delim;
@@ -491,7 +491,7 @@ void CLASS::set(std::string line)
 						//printf("%d regex %d match |%s|\n", ct, x, restofline.c_str());
 						operand = strs[0];
 						//printf("which=%d operand=|%s|\n",ct,operand.c_str());
-						i = operand.length();
+						i = (int)operand.length();
 						restofline = restofline.substr(i, restofline.length());
 						comment = Poco::trim(restofline);
 						match = true;
@@ -510,7 +510,7 @@ void CLASS::set(std::string line)
 		}
 	}
 	printlable = lable;
-	x = lable.length();
+	x = (int)lable.length();
 	if (x > 1)
 	{
 		// M32 syntax allows a colon after lable, and it is not part of the lable
@@ -941,7 +941,7 @@ int CLASS::doline(int lineno, std::string line)
 void CLASS::process(void)
 {
 
-	uint32_t ct = lines.size();
+	uint32_t ct = (uint32_t)lines.size();
 
 	uint32_t len, t, pos;
 
@@ -1698,7 +1698,7 @@ void CLASS::complete(void)
 			std::ofstream f(savepath);
 
 			uint32_t lineno = 0;
-			uint32_t l = lines.size();
+			uint32_t l = (uint32_t)lines.size();
 			while (lineno < l)
 			{
 				MerlinLine &line = lines.at(lineno++);
@@ -1976,12 +1976,12 @@ restart:
 					offset = slen;
 				}
 
-				x = mVec.size();
+				x = (int)mVec.size();
 				if (x > 0)
 				{
 					res = 0;
-					off = mVec[0].offset;
-					len = mVec[0].length;
+					off = (uint32_t)mVec[0].offset;
+					len = (uint32_t)mVec[0].length;
 					s = oper.substr(off, len);
 					slen = s.length();
 					sym = NULL;
@@ -2043,7 +2043,7 @@ bool CLASS::doOFF(void)
 	std::stack<TDOstruct> tmpstack;
 	TDOstruct doitem;
 
-	uint32_t ct = DOstack.size();
+	uint32_t ct = (uint32_t)DOstack.size();
 	if (ct > 0)
 	{
 		tmpstack = DOstack;
@@ -2101,7 +2101,7 @@ void CLASS::process(void)
 	{
 		initpass();
 
-		l = lines.size();
+		l = (uint32_t)lines.size();
 		bool passdone = false;
 		while ((!passdone) && (!passcomplete))
 		{
diff --git a/eval.cpp b/eval.cpp
index 7dce58b..086e379 100644
--- a/eval.cpp
+++ b/eval.cpp
@@ -391,7 +391,7 @@ int CLASS::parseAscii(std::string n, int64_t &val)
     bool high = false;
     uint8_t c;
 
-    uint32_t l = n.length();
+    uint32_t l = (uint32_t)n.length();
     for (uint32_t i = 0; i < l - 1; i++)
     {
         c = n[i];
@@ -442,7 +442,7 @@ int CLASS::parseNumber(std::string n, int64_t &val)
 
     //printf("parseNumber |%s|\n",n.c_str());
     i = 0;
-    l = n.length();
+    l = (uint32_t)n.length();
     s = "";
     for (i = 0; i < l; i++)
     {