diff --git a/engine/client/cl_parse.c b/engine/client/cl_parse.c
index cc15ee22e..8ecc33b84 100644
--- a/engine/client/cl_parse.c
+++ b/engine/client/cl_parse.c
@@ -695,11 +695,11 @@ qboolean CL_CheckHLBspWads(char *file)
 		if (!strcmp(key, "wad"))
 		{
 			s = wads;
-			while (s = COM_ParseToken(s, ";"))
+			while ((s = COM_ParseToken(s, ";")))
 			{
 				if (!strcmp(com_token, ";"))
 					continue;
-				while (w = strchr(com_token, '\\'))
+				while ((w = strchr(com_token, '\\')))
 					*w = '/';
 				w = COM_SkipPath(com_token);
 				Con_Printf("wads: %s\n", w);
diff --git a/engine/common/fs.c b/engine/common/fs.c
index 642f61712..eed7127b8 100644
--- a/engine/common/fs.c
+++ b/engine/common/fs.c
@@ -1890,7 +1890,7 @@ static qboolean Sys_SteamHasFile(char *basepath, int basepathlen, char *steamdir
 		RegQueryValueEx(key, "SteamPath", NULL, NULL, basepath, &resultlen);
 		RegCloseKey(key);
 		Q_strncatz(basepath, va("/SteamApps/common/%s", steamdir), basepathlen);
-		if (f = fopen(va("%s/%s", basepath, fname), "rb"))
+		if ((f = fopen(va("%s/%s", basepath, fname), "rb")))
 		{
 			fclose(f);
 			return true;
@@ -1937,7 +1937,7 @@ qboolean Sys_FindGameData(const char *poshname, const char *gamename, char *base
 		//well, okay, so they don't have quake installed from steam.
 
 		//quite a lot of people have it in c:\quake, as that's the default install location from the quake cd.
-		if (f = fopen("c:/quake/quake.exe", "rb"))
+		if ((f = fopen("c:/quake/quake.exe", "rb")))
 		{
 			//HAHAHA! Found it!
 			fclose(f);
@@ -1958,7 +1958,7 @@ qboolean Sys_FindGameData(const char *poshname, const char *gamename, char *base
 			resultlen = basepathlen;
 			RegQueryValueEx(key, "Path", NULL, NULL, basepath, &resultlen);
 			RegCloseKey(key);
-			if (f = fopen(va("%s/quake2.exe", basepath), "rb"))
+			if ((f = fopen(va("%s/quake2.exe", basepath), "rb")))
 			{
 				fclose(f);
 				return true;
@@ -1981,7 +1981,7 @@ qboolean Sys_FindGameData(const char *poshname, const char *gamename, char *base
 			RegQueryValueEx(key, "InstallPath", NULL, NULL, basepath, &resultlen);
 			RegCloseKey(key);
 
-			if (f = fopen(va("%s/ET.exe", basepath), "rb"))
+			if ((f = fopen(va("%s/ET.exe", basepath), "rb")))
 			{
 				fclose(f);
 				return true;
@@ -2003,7 +2003,7 @@ qboolean Sys_FindGameData(const char *poshname, const char *gamename, char *base
 			RegQueryValueEx(key, "InstallPath", NULL, NULL, basepath, &resultlen);
 			RegCloseKey(key);
 
-			if (f = fopen(va("%s/quake3.exe", basepath), "rb"))
+			if ((f = fopen(va("%s/quake3.exe", basepath), "rb")))
 			{
 				fclose(f);
 				return true;
diff --git a/engine/qclib/qccmain.c b/engine/qclib/qccmain.c
index b51876a2f..ebe1377c3 100644
--- a/engine/qclib/qccmain.c
+++ b/engine/qclib/qccmain.c
@@ -3220,7 +3220,7 @@ newstyle:
 
 		if (stat(destfile, &os) != -1)
 		{
-			while (pr_file_p=QCC_COM_Parse(pr_file_p))
+			while ((pr_file_p=QCC_COM_Parse(pr_file_p)))
 			{
 				if (stat(qcc_token, &s) == -1 || s.st_mtime > os.st_mtime)
 				{