diff --git a/cmake/DaemonFlags.cmake b/cmake/DaemonFlags.cmake
index e5b095e454..5f80248afb 100644
--- a/cmake/DaemonFlags.cmake
+++ b/cmake/DaemonFlags.cmake
@@ -27,6 +27,8 @@
 include(CheckCCompilerFlag)
 include(CheckCXXCompilerFlag)
 
+add_definitions(-DDAEMON_BUILD_${CMAKE_BUILD_TYPE})
+
 # Set flag without checking, optional argument specifies build type
 macro(set_c_flag FLAG)
     if (${ARGC} GREATER 1)
diff --git a/src/engine/renderer/tr_model_iqm.cpp b/src/engine/renderer/tr_model_iqm.cpp
index f2a461eb0c..7a889e428f 100644
--- a/src/engine/renderer/tr_model_iqm.cpp
+++ b/src/engine/renderer/tr_model_iqm.cpp
@@ -34,6 +34,12 @@ Maryland 20850 USA.
 
 #include "tr_local.h"
 
+/* Flags -O2, -O3 and -0s produce SIGBUS in R_LoadIQModel() on armhf,
+see https://github.com/DaemonEngine/Daemon/issues/736 */
+#if defined(DAEMON_ARCH_armhf) && !defined(DAEMON_BUILD_Debug) && __GNUC__
+	#pragma GCC optimize("O1")
+#endif
+
 #define	LL(x) x=LittleLong(x)
 
 static inline void *IQMPtr( iqmHeader_t *header, int offset ) {