diff --git a/Makefile b/Makefile
index 4becf6e1..4b923e57 100644
--- a/Makefile
+++ b/Makefile
@@ -53,6 +53,10 @@ ifeq ($(UNAME_S),NetBSD)
 	CFLAGS   += -pthread
 	CXXFLAGS += -pthread
 endif
+ifeq ($(UNAME_S),OpenBSD)
+	CFLAGS   += -pthread
+	CXXFLAGS += -pthread
+endif
 ifeq ($(UNAME_S),Haiku)
 	CFLAGS   += -pthread
 	CXXFLAGS += -pthread
diff --git a/ggml.c b/ggml.c
index f85138f3..8daac351 100644
--- a/ggml.c
+++ b/ggml.c
@@ -2,7 +2,7 @@
 
 #if defined(_MSC_VER) || defined(__MINGW32__)
 #include <malloc.h> // using malloc.h with MSC/MINGW
-#elif !defined(__FreeBSD__) && !defined(__NetBSD__)
+#elif !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__)
 #include <alloca.h>
 #endif
 
diff --git a/utils.cpp b/utils.cpp
index 03ed9bc0..a3bda156 100644
--- a/utils.cpp
+++ b/utils.cpp
@@ -12,7 +12,7 @@
 
  #if defined(_MSC_VER) || defined(__MINGW32__)
  #include <malloc.h> // using malloc.h with MSC/MINGW
- #elif !defined(__FreeBSD__) && !defined(__NetBSD__)
+ #elif !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__)
  #include <alloca.h>
  #endif