diff --git a/source/glest_game/ai/ai_interface.cpp b/source/glest_game/ai/ai_interface.cpp
index 687c456a9..51d7beeab 100644
--- a/source/glest_game/ai/ai_interface.cpp
+++ b/source/glest_game/ai/ai_interface.cpp
@@ -590,7 +590,7 @@ namespace
 					unit->getFullName(false).c_str(),
 					unit->getDesc(false).c_str(),
 					unit->getFaction()->getIndex());
-				printf(szBuf);
+				printf("%s", szBuf);
 				if (SystemFlags::getSystemSettingType(SystemFlags::debugSystem).
 					enabled)
 					SystemFlags::OutputDebug(SystemFlags::debugSystem, "%s\n",
@@ -678,7 +678,7 @@ namespace
 					unit->getFullName(false).c_str(),
 					unit->getDesc(false).c_str(),
 					unit->getFaction()->getIndex());
-				printf(szBuf);
+				printf("%s", szBuf);
 				if (SystemFlags::getSystemSettingType(SystemFlags::debugSystem).
 					enabled)
 					SystemFlags::OutputDebug(SystemFlags::debugSystem, "%s\n",
@@ -765,7 +765,7 @@ namespace
 					unit->getFullName(false).c_str(),
 					unit->getDesc(false).c_str(),
 					unit->getFaction()->getIndex());
-				printf(szBuf);
+				printf("%s", szBuf);
 				if (SystemFlags::getSystemSettingType(SystemFlags::debugSystem).
 					enabled)
 					SystemFlags::OutputDebug(SystemFlags::debugSystem, "%s\n",
@@ -854,7 +854,7 @@ namespace
 					unit->getFullName(false).c_str(),
 					unit->getDesc(false).c_str(),
 					unit->getFaction()->getIndex());
-				printf(szBuf);
+				printf("%s", szBuf);
 				if (SystemFlags::getSystemSettingType(SystemFlags::debugSystem).
 					enabled)
 					SystemFlags::OutputDebug(SystemFlags::debugSystem, "%s\n",
diff --git a/source/glest_game/world/unit_updater.cpp b/source/glest_game/world/unit_updater.cpp
index 5b13d13f2..4a5838e0a 100644
--- a/source/glest_game/world/unit_updater.cpp
+++ b/source/glest_game/world/unit_updater.cpp
@@ -1161,7 +1161,7 @@ namespace Glest {
 									builtUnit->create();
 
 									if (builtUnitType->hasSkillClass(scBeBuilt) == false) {
-										printf((string("Unit [") + builtUnitType->getName(false) + "] has no be_built skill, producer was [" + intToStr(unit->getId()) + " - " + unit->getType()->getName(false) + "].").c_str());
+										printf("%s", (string("Unit [") + builtUnitType->getName(false) + "] has no be_built skill, producer was [" + intToStr(unit->getId()) + " - " + unit->getType()->getName(false) + "].").c_str());
 										//throw megaglest_runtime_error("Unit [" + builtUnitType->getName(false) + "] has no be_built skill, producer was [" + intToStr(unit->getId()) + " - " + unit->getType()->getName(false) + "].");
 										return;
 									}